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

(E)-6-(4-methylbenzylidene)-5-oxo-5,6,7,8-tetrahydronaphthalene-2-carboxylic acid is a 2-?benzylidene tetrahydronaphthone derivative and can be used as a firefly luciferase inhibitor in kit.

7-hydroxycoumarinyl-γ-Linolenate is a γ-linolenic acid ester of 7-hydroxycoumarin (umbelliferone) that behaves as a substrate for cPLA2. Hydrolysis of 7-hydroxycoumarinyl-γ-linolenate by phospholipase results in the release of the fluorescent compound 7-hydroxycoumarin which can be monitored spectrophotometrically (excitation at 335 nm, emission at 450 nm).