从黄花倒水莲Polygala fallaxHem sl.根的降血脂有效部位中分离得到四个皂苷类化合物,分别鉴定为3-O-β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyl presenegen in 28-O-β-D-xylopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→2)--βD-fucopyransoyl ester(Ⅰ)、3-O--βD-glucopyranosyl-(1→2)--βD-glucopyranosyl presenegen in 28-O-β-D-xy-lopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→2)-(3-O-acetyl)-β-D-fucopyranosyl ester(Ⅱ)、3-O-β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyl presenegen in 28-O-β-D-xylopyranosyl-(1→4)--αL-rhamnopyranosyl-(1→2)-(4-O-acetyl)-β-D-fucopyranosyl ester(Ⅲ)和3-O-β-D-glucopyranosyl-(1→2)--βD-glucopyranosyl presenegen in 28-O-β-D-xylopyrano-syl-(1→4)-α-L-rhamnopyranosyl-(1→2)-(3,4-d iacetyl)--βD-fucopyranosyl ester(Ⅳ)。
Aim To study the chemical constituents of Polygala aureocauda Dunn.. Methods Chemical compounds were isolated by column chromatography and their structures were determined mainly by spectroscopic means (UV, IR, MS, ^1HNMR, ^13CNMR, HMQC, HMBC). Results Three compounds were isolated and identified as 3-hydroxy-1,4-dimethoxyxanthone (Ⅰ), 1,7-dihydroxy-2,3-methylendioxyxanthone ( Ⅱ ), 7-hydroxy-1-methoxy-2, 3-methylendioxyxanthone ( Ⅲ ). Conclusion Compounds Ⅰ -Ⅲ were isolated from Polygala aureocauda Dunn. for the first time, whereas compound Ⅰ is a new xanthone.
