Crossopetalum gaumeri

Ankli, A., Heilmann, J., Heinrich, M. and Sticher, O. (2000) Cytotoxic cardenolides and antibacterial terpenoids from Crossopetalum gaumeri. Phytochemistry, 54, 531-7. 

From the roots of Crossopetalum gaumeri Ankli and coworkers isolated four highly cytotoxic cardenolides. The methanol extract was fractionated using cytotoxicity against a KB cell line. The compounds showed characteristic signals for a butenolactone ring in its H-NMR... 

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