Cytotoxic Clerodane Diterpenoids from <i>Casearia </i><i>m</i><i>embranacea</i>
作者:Ya-Ching Shen、Yuan-Bin Cheng、Atallah F. Ahmed、Cheng Lin Lee、Shun-Ying Chen、Ching-Te Chien、Yao-Haur Kuo、Guo-Lin Tzeng
DOI:10.1021/np058063o
日期:2005.11.1
Bioassay-guided fractionation of the EtOAc extract of Casearia membranacea leaves and twigs afforded three newclerodane diterpenes, caseamembrins M-O (1-3), and the known rel-(2S,5R,6R,8S,9S,10R,18S,19R)-2-(2-methylbutyryloxy)-6-hydroxy-18,19-di-O-acet yl-18,19-epoxycleroda-3,13(16),14-triene (4) and caseamembrin D (5). The structures of 1-3, including the relative configurations, were established