O=[N+]([O-])c1ccc(C=Nc2ncccn2)cc1 mol32600 0_1 O=[N+]([O-])c1ccc(C=[NH+]c2ncccn2)cc1 mol32600 1_1 O=[N+]([O-])c1ccc(C=Nc2nccc[nH+]2)cc1 mol32600 1_2