4UH5:
reference: 2-Aminopyridines with a Truncated Side Chain To Improve Human Neuronal Nitric Oxide Synthase Inhibitory Potency and Selectivity., Kang S, Li H, Tang W, Martasek P, Roman LJ, Poulos TL, Silverman RB, J Med Chem. 2015 Jul 10. PMID: 26120733

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