inhibitor chemical role nitric oxide synthase inhibitor EC 1.14.13.39 inhibitors NADPH-diaphorase inhibitors endothelium-derived relaxation factor-forming enzyme inhibitors endothelium-derived relaxing factor synthase inhibitor nitric oxide synthetase inhibitor NADPH-diaphorase inhibitor nitric oxide synthetase inhibitors EC 1.14.13.39 inhibitor An enzyme inhibitor that inhibits the action of nitric oxide synthase, EC 1.14.13.39. NO synthase inhibitor chebi_ontology nitric-oxide synthetase inhibitor NO synthase inhibitors CHEBI:61908 endothelium-derived relaxation factor-forming enzyme inhibitor nitric-oxide synthetase inhibitors endothelium-derived relaxing factor synthase inhibitors nitric oxide synthase inhibitors