Journal
ORGANIC & BIOMOLECULAR CHEMISTRY
Volume 3, Issue 7, Pages 1227-1232Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b416868b
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Chemical investigation of ecdysteroidal constituents of the roots and stems of Cyathula officinalis led to the isolation of two cyasterone stereoisomers, 2 and 3, together with the known cyasterone 1. The structures of compounds 2 and 3 were determined to be 28-epi-cyasterone and 25-epi-28-epi-cyasterone, respectively, by means of spectroscopic analysis. X-Ray structures of 1 and 2 confirmed the 24S, 25S, 28R configuration for 1 and 24S, 25S, 28S for 2.
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