Abstract: This study aims to identify phenolic compounds in dichloromethane and methanolic extracts of the rhizome of Renealmia nicolaioides collected in the North Region of Brazil. Two known diarylheptanoids, 1,7-bis(4-hydroxyphenyl)-(1E)-1-hepten-3-one (1), and 5R-1,7-bis(4-hydroxyphenyl)-1E-hepten-5-ol (2), and a new one (1R,2S,5S)-2-hydroxy-1,7(p-hydroxyphenyl)-centrolobine (3), as well as one flavonoid, 3-metoxi-quercetin (4) were isolated by chromatographic procedure and identified by spectroscopic techniques (1H and13C NMR, HRMS and CD). The acetyl derivative of 2 was used to confirm its structure. All four compounds are reported for the first time for this genus, and this is the first occurrence of compound 1 as a natural metabolite. The results reported here are unprecedented for the genus Renealmia.

A composição de ácidos graxos de seis amostras de Orbignya phalerata de diferentes cidades do estado do Maranhão foi estudada. Os óleos foram extraídos utilizando extrator Soxhlet por duas metodologias e a composição de ácidos graxos foi avaliada por cromatografia gasosa-espectrometria de massas (CG-EM). O teor da fração de lipídios revelou que o solvente usado influencia na extração, sendo a maior porcentagem obtida com hexano. O teor de lipídios variou de 62,46-67,45%, com predominância de ácidos graxos saturados (80,32-87,80%), principalmente ácido láurico (C12:0) com percentual de 44,86-52,15%. A análise multivariada mostrou a distribuição das amostras de O. phalerata em três regiões distintas e sugere que a composição química dos óleos pode estar associada com a sua localização geográfica. Estes dados mostram o conhecimento da biodiversidade de ácidos graxos de O. phalerata entre as diferentes regiões do estado do Maranhão.

The fatty acid composition of six Orbignya phalerata samples of different cities from Maranhão State (Brazil) was studied. The oils were extracted by two methods using Soxhlet extractor and the fatty acid composition was evaluated by gas chromatography-mass spectrometry (GC-MS) analysis. The lipid fraction content showed that the solvent used influences lipid extraction, the highest percent was obtained with hexane. Lipid content ranged from 62.46-67.45%, with predominance of saturated fatty acids (80.32-87.80%), mainly lauric acid (C12:0) with 44.86 to 52.15%. Multivariate analysis showed the distribution of O. phalerata samples into three distinct regions and suggests that the oil chemical composition may be associated with their geographic location. These data show knowledge of the biodiversity of O. phalerata fatty acids among the different regions of the Maranhão State (Brazil).