N-Propyl-L-arginine explained

N-Propyl--arginine, or more properly N^G-propyl--arginine (NPA), is a selective inhibitor of neuronal nitric oxide synthase (nNOS).^[1]

1. Zhang . Henry Q. . Fast . Walter . Marletta . Michael A. . Martasek . Pavel . Silverman . Richard B. . 1997-11-01 . Potent and Selective Inhibition of Neuronal Nitric Oxide Synthase by N ω -Propyl- l -arginine . Journal of Medicinal Chemistry . en . 40 . 24 . 3869–3870 . 10.1021/jm970550g . 9397167 . 0022-2623.