Unprecedented furan-2-carbonyl C-glycosides and phenolic diglycosides from Scleropyrum pentandrum
作者:Wannaporn Disadee、Chulabhorn Mahidol、Poolsak Sahakitpichan、Somkit Sitthimonchai、Somsak Ruchirawat、Tripetch Kanchanapoom
DOI:10.1016/j.phytochem.2011.11.001
日期:2012.2
Five unprecedented furan-2-carbonyl C-glycosides, scleropentasides A-E, and two phenolic diglycosides, 4-hydroxy-3-methoxybenzyl 4-O-beta-D-xylopyranosyl-(1 -> 6)-beta-D-glucopyranoside and 2,6-dimethoxy-p-hydroquinone 1-O-beta-D-xylopyranosyl-(1 -> 6)-beta-D-glucopyranoside, were isolated from leaves and twigs of Scleropyrum pentandrum together with potalioside B, luteolin 6-C-beta-D-glucopyranoside (isoorientin), apigenin 8-C-beta-D-glucopyranoside (vitexin), apigenin 6,8-di-C-beta-D-glucopyranoside (vicenin-2), apigenin 6-C-alpha-L-arabinopyranosyl-8-C-beta-D-glucopyranoside (isoschaftoside), apigenin 6-C-beta-D-glucopyranosyl-8-C-beta-D-xylopyranoside, adenosine and L-tryptophan. Structure elucidations of these compounds were based on analyses of chemical and spectroscopic data, including 1D and 2D NMR. In addition, the isolated compounds were evaluated for their radical scavenging activities using both DPPH and ORAC assays. (C) 2011 Elsevier Ltd. All rights reserved.