New flavone C-glycosides from leaves of Sarcotheca griffithii (Hook F) Hallier F

Five new flavone C-glycosides, including chrysin 6-C-(2 ''-O-alpha-L-rhamnopyranosyl)-beta-D-glucopyranoside (1), chrysin 6-C-(2 ''-O-alpha-L-rhamnopyranosyl)-b-D-glucopyranosyl-7-O-beta-D-glucopyranoside (2), chrysin 6-C-(2 ''-O-alpha-L-rhamnopyranosyl)-6'-deoxy-ribo-hexos-3-uloside (3), chrysin 6-C-(2 ''-O-alpha-L-rhamnopyranosyl)-beta-L-fucopyranoside (4), chrysin 6-C-beta-boivinopyranosyl-7-O-beta-L-glucopyranoside (5), together with one known compound, isovitexin 2 ''-O-alpha-L-rhamnopyranoside (6), were isolated from leaves of Sarcotheca griffithii (Hook F) Hallier F (Oxalidaceae). Their structures were elucidated by analysis of the 1D, 2D NMR, and MS data, as well as by comparison with the literature data. This is the first report of secondary metabolites from the genus Sarcotheca. (C) 2014 Phytochemical Society of Europe. Published by Elsevier B. V. All rights reserved.