Sodium cromoglicate is a mast cell stabilizer with anti-inflammatory activity that prevents the release of inflammatory chemicals such as histamine, leukotrienes from mast cells.

4-Thiouridine (4-SU) is a photoactivatable ribonucleoside analog that is widely used for RNA analysis, including short-range RNA-RNA crosslinking and nascent RNA labeling. The crosslinking thio moiety is attached directly to the nucleotide base, thus 4-SU

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