23-epi-26-Deoxyactein (27-Deoxyactein) has anti-inflammatory activity, it inhibits nitric oxide production by reducing iNOS expression without affecting activity of the enzyme. It also has anti-cancer activity, it can inhibit growth of the MCF7 human breast cancer cells and induce cell cycle arrest at G1.

Myricetin 3-O-galactoside (Myricetin 3-O-beta-D-galactopyranoside) can inhibit xanthine oxidase (xanthine oxidase; XO) activity, lipid peroxidation and scavenging free radicals. Myricetin 3-O-galactoside has many effects, including cytotoxicity, anti-oxidation, anti-genotoxicity, anti-infectivity, anti-inflammatory and antioxidant activities, and its main effect is to inhibit the synthesis of inducible nitric oxide synthase (iNOS). The IC50 of Myricetin 3-O-galactoside inhibited lipid peroxidation was 160 μg/mL.

Siegeskaurolic acid exhibits anti-inflammatory and antinociceptive effects, which due to the inhibition of iNOS and COX-2 expression in RAW 264.7 macrophages via NF-kappaB inactivation.

Kobusin, a Calmodulin inhibitor, shows mild antiplasmodial,anti-inflammatory, and cytotoxic activities; it may be beneficial for the treatment of neuro-inflammatory diseases through the inhibition of iNOS expression and peroxynitrite scavenging potential. Kobusin can mildly reduce gastrointestinal motility in mice, it activates CFTR and CaCCgie chloride channel activities in mouse colonic epithelia and shows inhibitory effects toward ANO1/CaCC-mediated short-circuit currents in ANO1/CaCC-expressing FRT cells.

Cindunistat (free base) is an orally available selective iNOS inhibitor for the study of arthritis.