A new sesquiterpene lactone that was called inulonolide was isolated from Inula britannica. Its structure was established as 2-keto-1β,10β-epoxy-5,7,8,11α(H)-guai-3-en-8,12-olide based on spectral data and an X-ray crystal structure analysis.

中文翻译：

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来自 Inula britannica 的新倍半萜内酯

从 Inula britannica 中分离出一种新的倍半萜内酯，称为菊糖内酯。基于光谱数据和 X 射线晶体结构分析，其结构确定为 2-keto-1β,10β-epoxy-5,7,8,11α(H)-guai-3-en-8,12-olide。