6AV7:
reference: Improvement of Cell Permeability of Human Neuronal Nitric Oxide Synthase Inhibitors Using Potent and Selective 2-Aminopyridine-Based Scaffolds with a Fluorobenzene Linker., Do HT, Wang HY, Li H, Chreifi G, Poulos TL, Silverman RB, J Med Chem. 2017 Nov 22;60(22):9360-9375. doi: 10.1021/acs.jmedchem.7b01356. Epub, 2017 Nov 1. PMID: 29091437

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