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Two New Megastigmanes from the Leaves of Cucumis sativus

2007; Pharmaceutical Society of Japan; Volume: 55; Issue: 1 Linguagem: Inglês

10.1248/cpb.55.133

1347-5223

Hisahiro Kai, Masaki Baba, Toru Okuyama,

Sesquiterpenes and Asteraceae Studies

Two new megastigmane, cucumegastigmanes I (1) and II (2), together with a known megastigmane, (+)-dehydrovomifoliol (3), and five other known compounds were isolated from the leaves of Cucumis sativus. The structures of the new compounds were elucidated from spectroscopic analysis and their absolute stereochemistries were determined in detail using the chemical conversion and a modified Mosher's method.