Nc1cccc2[nH]cnc12 mol4483 0_1 Nc1cccc2[nH]c[nH+]c12 mol4483 1_1 [NH3+]c1cccc2[nH]cnc12 mol4483 1_2 [NH3+]c1cccc2[nH]c[nH+]c12 mol4483 2_1