Four New Flavonol Glycosides from the Leaves and Stems of Sedum Japonicum Subsp. Japonicum VAR. Japonicum

Abstract

Four new flavonol glycosides were isolated from the leaves and stems of Sedum japonicum subsp. japonicum var. japonicum, together with 23 known flavonoids. They were identified as kaempferol 3-O-[(6´´´´-E-p-coumaroyl-β-glucopyranosyl)-(1→2)-α-rhamnopyranoside]-7-O-[β-xylopyranosyl-(1→2)-α-rhamnopyranoside] (7), kaempferol 3-O-[(6´´´´-E-caffeoyl-β-glucopyranosyl)-(1→2)-α-rhamnopyranoside]-7-O-[β-xylopyranosyl-(1→2)-α-rhamnopyranoside] (8), herbacetin 3-O-β-glucopyranoside-8-O-β-(3´´´-acetylarabinopyranoside) (20) and gossypetin 3-O-β-glucopyranoside-8-O-β-(4´´´-acetylxylopyranoside) (25) by UV, HR-MS, acid hydrolysis and NMR. Its flavonoid profiles were chemotaxonomically compared with those of Japanese other two variety and subspecies, S. japonicum subsp. japonicum var. senanense and S. japonicum subsp. oryzifolium var. oryzifolium which have been surveyed and reported for flavonoids.

Keywords: Sedum japonicum subsp. japonicum var. japonicumHerbacetin 3, 8-glycosidesGossypetin 3, 8-glycosidesAcylated kaempferol polyglycosides