A new prenylated benzophenone, hypatulin C (1), was isolated from the leaves of Hypericum patulum together with a biogenetically related analog, hypelodin B (2). Hypatulin C (1) had a tricyclic [4.3.1.0^3,7]-decane moiety substituted by four prenyl groups. The structure of 1 was elucidated by detailed spectroscopic analyses, while the absolute stereochemistries of 1 and 2 were assigned by comparison of their ECD spectra with TDDFT calculated spectra.

中文翻译：

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贯叶连翘的烯丙基二苯甲酮衍生物。

从贯叶连翘的叶子中分离出一种新的异戊二烯基二苯甲酮hypatulin C（1）以及与生物遗传相关的类似物hypelodin B（2）。Hypatulin C（1）具有被四个异戊烯基取代的三环[4.3.1.0 ^3,7 ]-癸烷部分。通过详细的光谱分析阐明了1的结构，而1和2的绝对立体化学则通过比较ECD光谱和TDDFT计算的光谱来确定。