Phytochemistry p. 1647 - 1651 (1990)
Update date:2022-08-11
Topics:
Akihisa, Toshihiro
Kokke, W. C. M. C.
Yokota, Takao
Tamura, Toshitake
Matsumoto, Taro
The structure of a new 4α-methylsterol isolated from the immature seeds of Phaseolus vulgaris and the aerial parts of Gynostemma pentaphyllum has been shown to be 4α,14α-dimethyl-5α-ergosta-7,9(11),24(28)-trien-3β-ol by spectroscopic methods and by chemical correlation with obtusifoliol.This appears to be the first report of the isolation of a 4α-methylsterol with a Δ7,9(11)-diene system from nature.Abundances and chromatographic data of all identified 4α-methylsterols isolated from G. pentaphyllum are also given.
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