Rehmapicrogenin, isolated from the root of Rehmannia glutinosa, exhibits potent anti-inflammatory effect by inhibiting iNOS, COX-2 and IL-6.

AVE3085 is a potent endothelial nitric oxide synthase enhancer, used for cardiovascular disease treatment.

NOC 18 is a nitric oxide donor and activates an inward current in cultured rat cerebellar granules cells. NOC 18 increases cGMP production in cultured vascular smooth muscle cells. NOC 18 reduces contractility of cardiac muscle preparations in vitro.

Nω-Propyl-L-arginine (N-omega-Propyl-L-arginine) is a potent, competitive, and highly selective inhibitor of neuronal nitric oxide synthase (nNOS), with a Ki of 57 nM. Nω-Propyl-L-arginine displays a 149-fold selectivity for nNOS over endothelial NOS (eNOS).

Isosorbide dinitrate (ISDN) is an NO donor that prevents LV remodeling and degradation of cardiac function following myocardial infarction (MI).

S-Nitroso-N-acetyl-DL-penicillamine (SNAP) is a nitric oxide donor and acts as a stable inhibitor of platelet aggregation.

AR-C102222 hydrochloride is a potent, competitive, orally active and highly selective inducible nitric oxide synthase (iNOS) inhibitor, with an IC50 of 37 nM. AR-C102222 hydrochloride has antinociception and anti-inflammatory activities.

L-NAME is a nonselective inhibitor of nitric oxide synthetases (NOS) for nNOS (bovine), eNOS (human), and iNOS (murine), with Ki of 15 nM, 39 nM and 4.4 μM, respectively.

BYK191023 dihydrochloride (BYK-191023) is a potent, highly selective inhibitor of inducible nitric-oxide synthase (iNOS) with IC50 of 86 nM, >20-fold selectivity over nNOS and eNOS (IC50=17 and 162 uM).

BYK191023 (BYK-191023) is a potent, highly selective inhibitor of inducible nitric-oxide synthase (iNOS) with IC50 of 86 nM, >20-fold selectivity over nNOS and eNOS (IC50=17 and 162 uM).

3-Bromo-7-Nitroindazole is a more potent inhibitor of nNOS than 7-nitroindazole in vitro, is also potent against iNOS, inhibits rat nNOS, bovine eNOS, and rat iNOS with IC50 of 0.17, 0.86, and 0.29 uM..