Inulicin is a terpene lactone.

Dihydrolycorine is an inhibitors of protein synthesis in eukarytic cells, it halts protein synthesis in eukaryotic cells by inhibiting the peptide bone formation step. It protects against anoxia damage of brain in rat.Dihydrolycorine-HCL shows hypotensive effects, it can block alpha 1-adrenoceptors.

Isomitraphylline and pteropodine are the most suitable for standardization of medical cat's claw preparations. Isomitraphylline can inhibit proliferation of acute lymphoblastic leukaemia cells.