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1 alpha,20R-dihydroxyecdysone from Axyris amaranthoides
1Department of Biological Sciences, University of Exeter, Hatherly Laboratories, Devon, U.K.
Phytochemistry
|January 15, 1999
Abstract:
Bioassay/RIA-directed phytochemical examination of the seeds of Axyris amaranthoides afforded a new ecdysteroid: 1 alpha,20R-dihydroxyecdysone [1-epi-integristerone A], together with 20-hydroxyecdysone and polypodine B. The structure of 1 alpha,20R-dihydroxyecdysone was determined unequivocally by UV, LSIMS, and a combination of 1D and 2D NMR techniques.