Notes: Cerberin is a cardiac glycoside that has been found in C. odollam and has cytotoxic and cardiac modulatory activities.{62607,62608} It is cytotoxic to KB and NCI H187 cancer cells (IC50s = 1.92 and 1.24 µg/ml).{62607} Cerberin inhibits Na+/K+-ATPase, increasing intracellular sodium levels and action potential duration in cardiac cells.{62608}