Structure elucidation of cyasterone stereoisomers isolated from Cyathula officinalis
Keiko OkuzumiDepartment of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, JapanNoriyuki HaraDepartment of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, JapanHidehiro UekusaDepartment of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, JapanYoshinori FujimotoDepartment of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
2005en
ABI
Annotatsiya
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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