Two new prenylated coumarins, sinensins A and B, have been isolated from the roots of Spiranthes sinensis (Pers.) Ames. Their structures were elucidated as 5-gamma, gamma-dimethylallyl-8-2-(2,6-dihydroxyphenyl)-3-dimethyl-but-2-enyol-umbellifer on (1) and 4,6-di(gamma, gamma-dimethylallyl)-8-lavandulyl-umbelliferon (2) on the basis of spectroscopic analysis.
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机译：两种新的异戊二烯化香豆素，sinensins A 和 B，已从 Spiranthes sinensis （Pers.） Ames 的根中分离出来。在光谱分析的基础上，它们的结构被阐明为5-γ，γ-二甲基烯丙基-8-[2-（2,6-二羟基苯基）-3-二甲基-丁-2-烯基]-伞形酮（1）和4,6-二（γ，γ-二甲基烯丙基）-8-薰衣草酰伞形酮（2）。
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