Cytotoxic biflavonoids from Selaginella willdenowii
作者:Gloria L. Silva、Heebyung Chai、Mahabir P. Gupta、Norman R. Farnsworth、Geoffrey A. Cordell、John M. Pezzuto、Christopher W.W. Beecher、A. Douglas Kinghorn
DOI:10.1016/0031-9422(95)00212-p
日期:1995.9
Bioactivity-guided fractionation of the leaves of Selaginella willdenowii afforded three known biflavones, 4',7''-di-O-methylamentoflavone, isocryptomerin and 7''-O-methylrobustaflavone, that were significantly cytotoxic against a panel of human cancer cell lines. Non-cytotoxic isolates were also obtained, namely, amentoflavone, bilobetin, robustaflavone and 2'',3''-dihydroisocryptomerin, a new dihydrobiflavone. The structure for the new biflavonoid was unambiguously assigned by a combination of spectroscopic methods.