A new 27-norcucurbitane triterpenoid, 5β,19-epoxy-3β-hydroxy-19(R)-methoxy-27-norcucurbita-6,23(E)-dien-25-one (1), was isolated from the fruits of Momordica charantia var. abbreviata. Its structure was elucidated by spectroscopic analyses including 1D and 2D NMR (1H, 13C, COSY, HMQC, HMBC, and NOESY) and comparison with the data of known analogues.

中文翻译：

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来自苦瓜果实的一种新的 27-Norcucurbitane 三萜类化合物。缩写

一种新的 27-norcucurbitane triterpenoid, 5β,19-epoxy-3β-hydroxy-19(R)-methoxy-27-norcucurbita-6,23(E)-dien-25-one (1), 从果实中分离出来苦瓜变种。缩写。通过光谱分析阐明其结构，包括 1D 和 2D NMR（1H、13C、COSY、HMQC、HMBC 和 NOESY），并与已知类似物的数据进行比较。