Hepatoprotective phenylethanoid glycosides from Cirsium setosum
摘要:
Two new phenylethanoid glycosides, namely -D-glucopyranoside, 1-O-(7S)-7-(3-methoxyl-4-hydroxyphenyl)-7-methoxyethyl-3--L-rhamnopyranosyl-4-[(8E)-7-(3-methoxyl-4-hydroxyphenyl)-8-propenoate] (1) and -D-glucopyranoside, 1-O-(7S)-7-(3-methoxyl-4-hydroxyphenyl)-7-methoxyethyl-3 ''-alpha-L-rhamnopyranosyl-4-[(8E)-7-(4-hydroxyphenyl)-8-propenoate] (2), together with six phenylethanoid glycosides were isolated from Cirsium setosum. Their structures were elucidated by their spectroscopic data and references. Compounds 2, 4, 5, 7 and 8 (10M) exhibited moderate hepatoprotective activities. Compounds (3-8) were obtained from this plant for the first time.[GRAPHCIS].
phenylpropanoid glucoside, 2-(4-hydroxyphenyl)-ethyl-(6- O -caffeoyl)-β- D -glucopyranoside and a new bitter tannin-related compound, 3,4,5-trimethoxybenzoyl-β- D -glucopyranoside, have been isolated together with known compounds, 2-(3,4-dihydroxyphenyl)-ethyl-(6- O -caffeoyl)-β- D -glucopyranoside, 2-(3,4-dihydroxyphenyl)-ethyl-β- D -glucopyranoside and 6- O -caffeoyl- D -glucopyranose, from the bark of