Structure of a novel phytoecdysteroid, vitexirone, and efficient isolation of phytoecdysteroids fromVitex fisherii

descriptionPublicationkeyboard_double_arrow_right Article 01 Aug 1990 English Publisher:Springer Science and Business Media LLCJournal:Journal of Chemical Ecology, volume 16, pages 2,581-2,588 (issn: 0098-0331, eissn: 1573-1561,

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Authors: I, Kubo; Y, Asaka; M J, Stout; T, Nakatsu;

doi: 10.1007/bf01017480

pmid: 24264222

Structure of a novel phytoecdysteroid, vitexirone, and efficient isolation of phytoecdysteroids fromVitex fisherii

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Abstract

A novel phytoecdysteroid, vitexirone, has been isolated from a MeOH extract of the root bark of the East African medicinal plantVitex fisherii by recycling high-performance liquid chromatography on a semipreparative scale. In addition, three known phytoecdysteroids, 20-hydroxyecdysone, ajugasterone C, and turkesterone, also were isolated. The structure of vitexirone has been established spectroscopically. The position and stereochemistry of the 11-α-hydroxy group of ajugasterone C and vitexirone were confirmed by the(1)H-(1)H homonuclear COSY NMR data. These phytoecdysteroids disrupt the molting process of the pink bollwormPectinophora gossypiella.

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University of California, Berkeley
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