CLERODANE-TYPE DITERPENES AND OTHER CONSTITUENTS OF PENIANTHUS ZENKERI

Article abstract of DOI:10.1016/0031-9422(91)85047-4

Twenty-four compounds were isolated from Penianthus zenkeri and their structures determined by spectroscopic and chemical studies. 6-Hydroxycolumbin, 6-hydroxyisocolumbin, penianthic acid methyl ester, 2β,3α-dihydroxy-2,3,7,8α-tetrahydropenianthic acid lactone and the glycosides floribundic acid glucoside and zenkerin are new clerodanes or clerodane derivatives. Key Word Index: Penianthus zenkeri; Menispermaceae; alkaloids; clerodanes; 6-hydroxycolumbin; 6-hydroxyisocolumbin; penianthic acid methyl ester; 2β,3α-dihydroxy-2,3,7,8α-tetrahydropenianthic acid lactone; floribundic acid glucoside; zenkerin.