AFR was considered dependent variable in the three regressions R

AFR was considered dependent variable in the three regressions. Relation between AFR x SCNS resulted in a higher coefficient of determination (0.87). Leaf area estimated by the equation see more obtained from AFR x SCNS relation was 87% accurate, according to AFR x AFE (estimated leaf area) relation. Therefore, leaf area from grapevine ‘BRS-Violeta’ cultivar can be estimated by the equation: y = 0.2169 (SCNS)(2) + 5.3642 (SCNS) – 34.725, with adequate accuracy.”
“The flow of energy and nutrients between trophic levels is affected by both

the trophic structure of food webs and the diversity of species within trophic levels. However, the combined effects of trophic structure and diversity on trophic transfer remain largely unknown. Here we ask whether changes in consumer diversity have the same effect as changes in resource diversity on rates of resource consumption. We address this question by focusing on consumer-resource dynamics Selleckchem AL3818 for the ecologically important process of decomposition. This study compares the top-down effect of consumer (detritivore) diversity on the consumption of dead organic matter (decomposition)

with the bottom-up effect of resource (detrital) diversity, based on a compilation of 90 observations reported in 28 studies. We did not detect effects of either detrital or consumer diversity on measures of detrital standing stock, and effects on consumer standing stock were equivocal. However, our meta-analysis indicates that reductions in detritivore diversity result in significant reductions in the rate of Selleckchem H 89 decomposition. Detrital diversity has both positive and negative effects on decomposition, with no overall trend. This difference between top-down and bottom-up effects of diversity is robust to different effect size metrics and could not be explained by differences in experimental systems or designs between detritivore and detrital manipulations. Our finding that resource diversity

has no net effect on consumption in “brown” (detritus-consumer) food webs contrasts with previous. ndings from “green” (plant-herbivore) food webs and suggests that effects of plant diversity on consumption may fundamentally change after plant death.”
“Three series of 6,7-dimethoxyquinazoline derivatives substituted in the 4-position by aniline, N-methylaniline and aryloxy entities, targeting EGFR and VEGFR-2 tyrosine kinases, were designed and synthesized. Pharmacological activities of these compounds have been evaluated for their enzymatic inhibition of VEGFR-2 and EGFR and for their antiproliferative activities on various cancer cell lines. We have studied the impact of the variation in the 4-position substitution of the quinazoline core. Substitution by aryloxy groups led to new compounds which are selective inhibitors of VEGFR-2 enzyme with IC(50) values in the nanomolar range in vitro.

A number of retrospective studies propose that serological respon

A number of retrospective studies propose that serological response may be slower, or serological failure may be higher, among HIV-positive individuals, but these studies are limited by high loss to follow-up, high reinfection rates and a focus on serological rather than clinical response. Beyond penicillin, some evidence suggests equivalence of macrolides, cephalosporins and doxycycline, although macrolide resistance is an increasing concern. Summary Until a prospective, randomized YH25448 study is conducted, inconsistency with treatment will continue. We offer a pragmatic

approach to recognizing patients who may require further investigation or neuropenetrative antibiotic treatment.”
“Sensory hair cells aremechanoreceptors of the auditory and vestibular systems and are crucial for hearing and balance. In adult mammals, auditory hair cells check details are unable to regenerate, and damage to these cells results in permanent hearing loss. By contrast, hair cells in the chick cochlea and the zebrafish lateral line are able to regenerate,

prompting studies into the signaling pathways, morphogen gradients and transcription factors that regulate hair cell development and regeneration in various species. Here, we review these findings and discuss how various signaling pathways and factors function to modulate sensory hair cell development and regeneration. By comparing and contrasting development and regeneration, we also highlight the utility and limitations of using defined developmental cues to drive mammalian hair cell regeneration.”
“Diabetes and obesity are associated with nonalcoholic fatty liver disease (NAFLD) and an increased incidence of hepatocellular carcinoma (HOC). NAFLD is the commonest cause of chronic liver disease. HOC can develop in NAFLD patients even without cirrhosis, suggesting an association between the metabolic

process and HOC and raising a concern that many cancers could be missed given high NAFLD prevalence and screening limitations. The increasing prevalence of these conditions and lack of effective treatments necessitate a better understanding of their connection. This article defines the known interrelationships and common pathways between NAFLD, diabetes, obesity and HOC and possible chemoprevention strategies.”
“We attempted to clarify the ISRIB chemical structure reason why folate fortification ameliorates hyperhomocysteinemia induced by vitamin B-6 deficiency. Hyperhomocysteinemia caused by vitamin B-6 deficiency significantly decreased the rat liver 5-methyltetrahydrofolate level which was significantly improved by folate fortification. This result suggests that the amelioration of hyperhomocysteinemia in response to folate supplementation had enhanced the removal of homocysteine via methionine synthase.”
“Using differential velocity centrifugation, cell membranes of Artemia sp. were prepared, and their binding to white spot syndrome virus (WSSV) was analyzed in vitro.

Both IL-17C and polyI:C increased

Both IL-17C and polyI:C increased PD173074 the expression of antimicrobial peptides and proinflammatory cytokines, such as human beta-defensin (hBD) 2, colony-stimulating

factor 3 (CSF3), and S100A12 in NHBE cells. Knockdown of IL-17 receptor (IL-17R) E, the specific receptor for IL-17C, using IL-17RE small interfering RNA, attenuated polyI:C-induced hBD2, CSF3, and S100A12 expression, without any reduction of polyI:C-induced IL-17C expression, which suggest that IL-17C enhances hBD2, CSF, and S100A12 expression in an autocrine/paracrine manner in NHBE cells. Knockdown of IL-17C also decreased polyI:C-induced hBD2, CSF3, and S100A12 expression. Thus, our data demonstrate that IL-17C is an essential epithelial cell-derived cytokine that enhances mucosal host defense responses in a unique autocrine/paracrine manner in the airway epithelium.”
“Background: Angiogenesis inhibitor Hyperlactatemia upon admission is a documented risk factor for mortality in critically ill adult patients. However, the predictive

significance of a single lactate measurement at admission for mortality in the general population of critically ill children remains uncertain. This study evaluated the predictive value of blood lactate levels at admission and determined the cutoff values for predicting inhospital mortality in the critically ill pediatric selleck chemicals llc population. Methods: We enrolled 1109 critically ill children who were admitted to a pediatric intensive care unit between July 2008 and December 2010. Arterial blood samples were collected in the first 2 hours after admission, and

the lactate levels were determined. The Pediatric Risk of Mortality III (PRISM III) scores were calculated during the first 24 hours after admission. Results: Of the 1109 children admitted, 115 (10.4%) died in the hospital. The median (interquartile range) blood lactate level in critically ill children was 3.2 mmol/l (2.24.8). Among the children, 859 (77.5%) had a lactate concentration bigger than 2.0 mmol/l. The blood lactate level upon admission was significantly associated with mortality (odds ratio [OR] = 1.38; 95% confidence interval [CI], 1.301.46; p smaller than 0.001), even after adjustment for age, gender, and illness severity assessed by PRISM III (OR = 1.27; p smaller than 0.001). Multivariate regression analysis showed that a high blood lactate level (OR = 1.17; 95% CI, 1.071.29; p = 0.001), a high PRISM III score (OR = 1.15; 95% CI, 1.111.20; p smaller than 0.001), and a low serum albumin (OR = 0.92; 95% CI, 0.880.96; p smaller than 0.001) were independent risk factors for mortality in critically ill children. Blood lactate achieved an area under-the-receiver-operating-characteristic curve (AUC) of 0.79 (p smaller than 0.

006) The median duration of beta-lactam antibiotic before reacti

006). The median duration of beta-lactam antibiotic before reaction onset was 25 days. Abdominal pain occurred in 9 patients (82%), fever in 3 (27%), and rash in 5 (45%). Seven patients (64%) developed a combination of thrombocytopenia, neutropenia, and/or lymphopenia and 6 (55%), elevated liver enzymes. Conclusions: This adverse reaction, occurring late during prolonged IV bolus beta-lactam treatment, is most often characterized by short-lived abdominal

pain occurring at the time of infusion and is more common in patients receiving benzyl penicillin. It is frequently associated with cytopenias and elevated liver enzymes. It may have both immunological and non-immunological mechanisms.”
“A new zinc(II)-cofactor coupled to a testosterone anchor, zinc(II)-N,N-bis(2-pyridylmethyl)-1,3-diaminopropa-2-ol-N’(17′-succinimidyltestosterone) Buparlisib price (Zn-Testo-BisPyPol) 1-Zn has been synthesized and fully characterized. It has been further associated with a neocarzinostatin buy AZD6094 variant,

NCS-3.24, to generate a new artificial metalloenzyme following the so-called ‘Trojan horse’ strategy. This new 1-Zn-NCS-3.24 biocatalyst showed an interesting catalytic activity as it was found able to catalyze the hydrolysis of the RNA model HPNP with a good catalytic efficiency (k(cat)/K-m = 13.6 M-1 s(-1) at pH 7) that places it among the best artificial catalysts for this reaction. Molecular modeling BIX 01294 solubility dmso studies showed that a synergy between the binding of the steroid moiety and that of the BisPyPol into the protein binding site can

explain the experimental results, indicating a better affinity of 1-Zn for the NCS-3.24 variant than testosterone and testosterone-hemisuccinate themselves. They also show that the artificial cofactor entirely fills the cavity, the testosterone part of 1-Zn being bound to one the two subdomains of the protein providing with good complementarities whereas its metal ion remains widely exposed to the solvent which made it a valuable tool for the catalysis of hydrolysis reactions, such as that of HPNP. Some possible improvements in the ‘Trojan horse’ strategy for obtaining better catalysts of selective reactions will be further studied. (C) 2014 Elsevier Ltd. All rights reserved.”
“Leptin has an anorexigenic effect in fish, indicating a role in regulation of growth and energy homeostasis. The study aimed to further clarify the physiological role of leptin in rainbow trout, specifically its short-term response to feed intake after a period of fasting. Utilizing a salmonid leptin radioimmunoassay, the study demonstrates differences in plasma leptin levels in fishes with different nutritional status and at the onset of feeding. Some of the fasted fish were clearly in a state of anorexia, and did not initiate feeding during the 72 h refeeding period.


“Neodymium-doped silicon-rich silicon oxide thin films SiO


“Neodymium-doped silicon-rich silicon oxide thin films SiOx:Nd (1 smaller than = x smaller

than = 2) were deposited by thermal co-evaporation of SiO and SiO2 and annealed at temperatures up to 1200 C. Due to the phase separation process induced by annealing treatments, amorphous silicon nanoparticles (aSi-np) are obtained. For annealing temperatures equal to or above 1000 degrees C, silicon nanocrystals (Si-nc) embedded in a SiO2 matrix are obtained. Photoluminescence (PL) properties of the SiOx:Nd thin films were studied as a function of the silicon excess, the annealing temperature and the Nd content. For annealed samples, Nd-related PL peaks at 920 nm, 1100 nm and 1400 nm are observed. It is shown that, despite the efficient

energy transfer between Si-nc and Nd3+ ions, the highest luminescence learn more intensity is obtained for samples containing aSi-np. Moreover, the concentration quenching effect occurs for higher concentration values in samples containing aSi-op, compared to that containing Si-nc. These results show that Si-nc are not necessary to indirectly excite Nd3+ ions and that samples annealed this website at temperatures lower than 800 degrees C are of potential interest for applications because of a lower thermal budget compared to that required for samples containing Si-nc. (C) 2014 Elsevier B.V. All rights reserved.”
“Temozolomide is a chemotherapeutic drug that is mainly used in the treatment of primary glioblastoma multiforme and recurrent high-grade glioma. Here, we report an efficient good manufacturing practice compliant method for the synthesis of [3-N-C-11-methyl]temozolomide from 3-N-hydroxymethyl temozolomide that cleaves off formaldehyde in situ and becomes activated towards alkylation with [C-11]methyl iodide. The labelling method was developed for an on-going patient study in which the predictive value of [3-N-C-11-methyl]temozolomide and positron emission

tomography on the outcome of temozolomide treatment is being investigated. The precursor was reacted with [C-11]methyl iodide in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene in acetonitrile, heated at stepwise increasing temperature. Purification by semipreparative HPLC with pharmaceutical MLN2238 inhibitor grade eluent and filtration gave approximately 10mL sterile product solution ready for injection containing 1.55 +/- 0.38GBq (n=5), the specific activity was 88 +/- 25GBq/mu mol and the radiochemical purity was 98.5 +/- 1.9%. C-13-NMR spectroscopy confirmed the labelled position after colabelling with C-11 and C-13.”
“Inefficient muscle long-chain fatty acid (LCFA) combustion is associated with insulin resistance, but molecular links between mitochondrial fat catabolism and insulin action remain controversial.

Again, during axial rotation, the increase in motion was 2 3-fold

Again, during axial rotation, the increase in motion was 2.3-fold when compared to the intact model.\n\nCervical spondylolysis can cause biomechanical alterations, especially in axial rotation, leading to increased disc stresses and range of motion. The increased stresses in the disc and the hypermobility would be a dangerous condition for athletes participating in contact sports such as judo. Thus, we recommended that judo players with cervical spondylolysis should change to non-contact sports, such as jogging.”
“Intravenous (IV) see more catheter placement in the pediatric patient population can

be challenging. Many health care providers automatically choose IV fluid administration to treat dehydration, often not considering other routes. This article reviews the available literature on difficulties in obtaining JNJ-26481585 IV access in the pediatric population and discusses alternative methods for fluid replacement, their respective advantages and disadvantages, and place in therapy.”
“Estimation

of regional tissue oxygenation (rStO(2)) by near infrared spectroscopy enables non-invasive end-organ oxygen balance monitoring and could be a valuable tool in intensive care. However, the diverse absolute values and dynamics of different devices, and overall poor repeatability of measurements are a problem. The aim of the present study is to test the hypothesis that INVOS 5100C, FORE-SIGHT and NONIN EQUANOX 7600 have similar properties concerning absolute values, repeatability, and sensitivity to changes in rStO(2). To test repeatability the sensors were buy Alisertib repositioned 20 times during hemodynamic steady state on the adult forearm. Afterwards six vascular occlusions by inflation of an upper arm cuff were done

to achieve low oxygenation in the forearm. Absolute values were compared by repeated-measures ANOVA, repeatability was estimated by the within-subject standard deviation, S-w, and response to changing oxygenation by the down slope of rStO(2) during vascular occlusion in the respective arm. 10 healthy adults, 21-29 years old, with double skinfolds on the forearm less than 10 mm participated. The median rStO(2) was 70.7 % (interquartile range (IQR) 7.7 %), 68.4 % (IQR 8.4 %), and 64.6 % (IQR 4.8) with INVOS, NONIN, and FORE-SIGHT, respectively, the median rate of decline was 13.2 %/min (IQR 9.6), 22.8 %/min (IQR 18.0), and 10.8 %/min (IQR 6.0), and the same-site repeatability was 2.9 % (95 % CI 2.4-3.3), 4.6 % (CI 3.9-5.3), and 2.0 % (CI 1.7-2.3). INVOS gave significantly higher steady state values than FORE-SIGHT, and NONIN had the steepest decline in rStO(2), but the poorest repeatability. Two measures of signal-to-noise were similar among devices. This suggests that good repeatability comes at the expense of low sensitivity to changes in oxygenation. Values of rStO(2) on the forearm from INVOS, NONIN and FORE-SIGTH cannot be used interchangeably.

(C) 2011

(C) 2011 click here Elsevier B.V. All rights reserved.”
“The increasing number of G protein-coupled receptor (GPCR) crystal structures offers new opportunities for histamine receptor homology modeling. However, computational prediction of ligand binding modes in GPCRs such as the histamine H-4 receptor (H4R), a receptor that plays an important role in inflammation, remains a challenging task. In the current work we have combined complementary in silico receptor modeling approaches with in vitro ligand structure-activity relationship (SAR)

and protein site-directed mutagenesis studies to elucidate the binding modes of different ligand classes in H4R. By systematically considering different H4R modelling templates, ligand binding Navitoclax inhibitor poses, and ligand protonation states in combination with docking and MD simulations we are able to explain ligand-specific mutation effects and subtle differences in ligand SAR. Our studies confirm that a combined theoretical and experimental approach represents a powerful strategy to map ligand-protein interactions.”
“Three-dimensional (3-D) stereoscopic vision is theoretically superior to two-dimensional (2-D) vision

in endoscopic endonasal surgery. However, only few reports have quantitatively compared endoscopic performance under the two visual conditions. We introduced a newly designed stereoendoscopic system with a “dual-lens and single camera” for endoscopic endonasal surgery and objectively compared the performances under 3-D and high-definition 2-D visualizations on a dry laboratory model.\n\nThirty subjects without experience performing endoscopic surgery, computer-simulated training or any 3-D video system were recruited and divided into two groups (Group A and Group B) for performing two different tasks. The novel 4.7-mm-diameter stereoendoscope provided high-definition (HD) images. In Task 1, Group A started the task under the 3-D condition followed by the 2-D BTK inhibitor molecular weight condition, and Group B vice versa. In Task 2, Group A started the task under the 2-D condition followed by the

3-D condition, and Group B vice versa. The performance accuracy and speed under the two visual conditions were analyzed.\n\nSignificant improvement in performance accuracy and speed was seen under 3-D conditions in the both “3-D first” and “2-D first” subgroups during both tasks (P < .001). Regardless of order, the inaccuracy rate and performance time under 3-D conditions was significantly lower than that under 2-D conditions in each subject.\n\nWe demonstrated the advantage of 3-D visualization over 2-D visualization for inexperienced subjects. Further quantitative clinical studies are required to confirm whether stereoendoscopy actually provides benefits in clinical settings.”
“Objective: Valid and reliable instruments to measure aspects of hand hygiene are needed to determine the current situation and impact of training among health professionals.

e omissions, additions and substitutions) All errors were indep

e. omissions, additions and substitutions). All errors were independently rated by a senior psychiatrist and a senior clinical psychologist to determine whether the errors were likely to have a bearing on clinical decisions concerning the patient and to rate whether errors deemed clinically

significant contributed to making the patient appear more ill psychiatrically, or less ill. Of the 57 errors recorded, 46% were rated as likely to have an impact on the goal of the clinical session. Raters concurred that the clinically significant errors contributed towards potentially making the patient look more psychiatrically ill. Detailed analyses of evaluations demonstrate the complexity of informal interpreter positioning regarding GS-7977 order issues of diagnosis and cultural factors in illness. Evaluations conducted where clinicians and interpreters are not trained in language and interpreting issues may create a distorted picture of the patients’ mental health conditions. (C) 2014

Published by Elsevier Ltd.”
“N-methyl-d-aspartate (NMDA) receptors are ionotropic glutamate receptors widely distributed in the central nervous system, and have been extensively investigated for their roles in embryonic development, synaptic plasticity and neuroexcitoxicity. Their functions in the peripheral nervous system and non-neural tissues have caught much see more attention recently. Over-activation of NMDA receptors induces excitotoxic lung injury. But the endogenous cell types in the lungs that express NMDA receptors remains elusive and the

molecular mechanism underlies NMDA-induced lung injury has not been fully characterized. In this work, we reported that functional NMDA receptors were expressed in alveolar type II cells in the lungs. PF-562271 inhibitor Over-activation of these receptors led to down-regulation of pulmonary surfactants synthesis. We further demonstrated that decreased cellular choline-phosphate cytidylyltransferase alpha expression induced by NMDA treatment accounted for the decreased pulmonary surfactants synthesis. Our results provided important clues for treatment of glutamate lung injury by modulating pulmonary surfactants system.”
“GIT (G protein-coupled receptor kinase-interacting protein) and PIX (p21-activated kinase-interacting exchange factor) family proteins integrate signaling pathways involving Arf and Rho family GTPases. GIT1 and beta-PIX form a constitutively associated complex that acts as a scaffold to allow the formation of large multiprotein assemblies that regulate synaptogenesis, cell polarity and cell migration among other physiological processes. Complex formation is mediated by the GIT binding domain (GBD) in beta-PIX, which recognizes the Spa homology domain of GIT1. Both binding domains are adjacent to predicted coiled-coil segments that allow homo-oligomerization of GIT1 and beta-P1X, respectively.

Copyright (C) 2008 John Wiley & Sons,

Ltd “
“Backgro

Copyright (C) 2008 John Wiley & Sons,

Ltd.”
“Background: Medication nonadherence is a common problem among the elderly.\n\nObjective: To conduct a systematic review of the published literature describing potential nonfinancial barriers to medication adherence among the elderly.\n\nMethods: The PubMed and PsychINFO databases were searched for articles published in English between January 1998 and January 2010 that (1) described “predictors,” “facilitators,” or “determinants” of medication adherence or that (2) examined the “relationship” between a specific barrier and adherence for elderly patients (ie, years of age) in the United States. A manual search of the reference lists of identified articles and the authors’ files and recent review articles was conducted. The search included articles that (1) reviewed specific barriers to selleckchem medication adherence and did not solely describe nonmodifiable predictors of adherence (eg, demographics, marital status), (2) were not interventions designed to address adherence, (3) defined adherence or compliance and specified its method of measurement, and (4) involved US participants only. Nonsystematic

reviews were excluded, as were studies that focused specifically on people who were homeless or substance abusers, or patients with psychotic disorders, tuberculosis, or HIV infection, because of the unique circumstances that surround medication adherence for each of these populations.\n\nResults: Nine studies met inclusion criteria for this review. Four studies used pharmacy check details records or claims data to assess adherence, 2 studies used pill count or electronic monitoring, and 3 studies used other methods to assess adherence. Substantial heterogeneity existed among the populations studied as well as among the measures of adherence, barriers addressed, and significant findings. Some potential barriers (ie, factors associated with nonadherence) were identified from the studies, including patient-related factors such as disease-related knowledge, health literacy, and cognitive function; drug-related factors such as adverse effects and polypharmacy; Elafibranor and other factors including the patient-provider relationship and various logistical barriers

to obtaining medications. None of the reviewed studies examined primary nonadherence or nonpersistence.\n\nConclusion: Medication nonadherence in the elderly is not well described in the literature, despite being a major cause of morbidity, and thus it is difficult to draw a systematic conclusion on potential barriers based on the current literature. Future research should focus on standardizing medication adherence measurements among the elderly to gain a better understanding of this important issue. (Am J Geriatr Pharmacother. 2011;9:11-23) Published by Elsevier HS Journals, Inc.”
“Sixteen new coral reef cores were collected to better understand the accretion history and composition of submerged relict reefs offshore of continental southeast (SE) Florida.

Ex vivo fucosylation did not alter the biodistribution of engraft

Ex vivo fucosylation did not alter the biodistribution of engrafting cells or pattern of long-term, multilineage, multi-tissue engraftment. We propose that ex vivo fucosylation click here will similarly improve the rate and magnitude of engraftment for CB transplant recipients in a clinical setting. (C) 2012 ISEH – Society for Hematology and Stem Cells. Published by Elsevier Inc.”
“Background and Objective: Analyzing responses of human periodontal ligament cells to mechanical stress and mechanotransduction is important for understanding periodontal tissue physiology and remodeling. It has been shown that the cellular response

to mechanical stress can vary according to the type and duration of force and to extracellular attachment conditions. This study investigated the gene-expression profile of human periodontal ligament cells cultured in two-dimension (2D) and three-dimension (3D) conditions after application of compressive stress for 2 and 48 h. Material and Methods: Human primary periodontal selleckchem ligament cells were obtained from premolars extracted for orthodontic purposes. Cells were cultured in a conventional

2D culture dish or in 3D collagen gel and compressive stress was applied for 2 and 48 h. Control cells were cultured under identical conditions but without the application of compressive stress. After the application of compressive stress, total RNA was extracted and a cDNA microarray was performed. Microarray data were analyzed using statistical methods, including david and gene set enrichment analysis to identify significant signaling pathways. Real-time PCR was performed for five mRNAs in order to confirm the cDNA microarray results. Results: The cDNA microarray

analysis revealed that after application of compressive stress for 2 h, 191 and 553 genes showed changes in their expression levels in 2D and 3D cultured cells, respectively. After application of compressive stress for 48 h, 280 and 519 genes showed changes in their expression levels in 2D and 3D cultured cells, respectively. Euclidean clustering method selleck products was used to demonstrate the gene-expression kinetics. Conclusion: Analysis of the results showed that several signaling pathways, including the MAPK pathway and the focal adhesion kinase pathway are relevant to the compressive force-induced cellular response. 2D and 3D cultured cells showed significantly different gene-expression profiles, suggesting that cellular attachment to extracellular matrix influences cellular responses to mechanical stresses.”
“Caper (Capparis spinosa L.) fruits have been widely used as food and folk medicine in the Mediterranean basin and in central and west Asia. In this study, two biflavonoids, isoginkgetin, and ginkgetin, together with three other flavonoids, were isolated from caper fruits. Their chemical structures were elucidated by spectroscopic analyses and comparison with literature.