Chemical and Pharmaceutical Bulletin 1990-Dec
New antitumor principles, casearins A-F, for Casearia sylvestris Sw. (Flacourtiaceae).
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Keywords
Abstract
New antitumor clerodane diterpenes, named casearins A-F, have been isolated from the leaves of Casearia sylvestris Sw. (Flacourtiaceae). These structures have been completely elucidated by two dimensional nuclear magnetic resonance, circular dichroism spectroscopy, X-ray analysis, and chemical evidences.