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An unusual ecdysteroid, (20S)-cholesta-7,14-diene-3β,5α,6α,20,25-pentaol(bombuycosterol)from the ovaries of the silkworm, Bombyx mori

Yoshinori Fujimoto, Satoru Miyasaka, Takafumi Ikeda, Nobuo Ikekawa, Eiji Ohnishi, Takashi Mizuno, Kunio Watanabe

Abstract

A novel ecdysteroid, for which the name bombycosterol is proposed, has been isolated from the ovaries of the silkworm Bombyx mori and its structure was determined as (20S)-Cholesta-7,14-diene-3β,5α,6α,20,25-pentaol (1) by spectroscopic means and 1H n.m.r. comparison with a reference compound (3).

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Key concepts: Ecdysteroid, Bombyx mori, Diene, Bombyx, Stereochemistry, Biology, Chemistry, Botany