Nω-Propyl-L-arginine (N-omega-Propyl-L-arginine) hydrochloride 是一种高效、竞争性、高选择性的神经型一氧化氮合酶 (nNOS) 抑制剂，Ki为 57 nM。Nω-Propyl-L-arginine hydrochloride 对 nNOS 的选择性是内皮型一氧化氮合酶 (eNOS) 的 149 倍。 Nω-Propyl-L-arginine (N-omega-Propyl-L-arginine) hydrochloride is a potent, competitive, and highly selective inhibitor of neuronal nitric oxide synthase (nNOS), with a Ki of 57 nM. Nω-Propyl-L-arginine hydrochloride displays a 149-fold selectivity for nNOS over endothelial NOS (eNOS).