Stereochemistry of the reduction of 24-methyldesmosterol to campesterol and dihydrobrassicasterol in higher plants

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Yoshinori Fujimoto, Naoko Sato, Keisuke Iwai, Hiroki Hamada, Junko Yamada and Masuo Morisaki


Abstract

Feeding of chemically synthesized [26-13C]- and [27-13C]-labelled 24-methyldesmosterols to tissue cultures of Oryza satiba and Catharanthus roseus followed by 13C NMR analysis of the biosynthesized sterols reveals that reduction of the 24(25)-double bond giving either campesterol or dihydrobrassicasterol takes place in an anti-manner.


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