Cerberin
Cerberin is a cardiac glycoside that has been found in C. odollam and has cytotoxic and cardiac modulatory activities. It is cytotoxic to KB and NCI H187 cancer cells (IC50s=1.92 and 1.24 μg/mL).1 Cerberin inhibits Na+/K+-ATPase, increasing intracellular sodium levels and action potential duration in cardiac cells.