title: Two new megastigmanes from the leaves of Cucumis sativus.
abstract: 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.
authors.affiliation: Department of Natural Medicine and Phytochemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose, Tokyo 204-8588, Japan.
authors.forename: Hisahiro
authors.initials: H
authors.lastname: Kai
authors.forename: Masaki
authors.initials: M
authors.lastname: Baba
authors.forename: Toru
authors.initials: T
authors.lastname: Okuyama
mesh_terms: D018553:Cucumis sativus / Q000737:chemistry*; D045792:Norisoprenoids / Q000737:chemistry / Q000302:isolation & purification*; D018515:Plant Leaves / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods
chemical_list: D045792:Norisoprenoids