Nc1ccc2[nH]cnc2c1 mol4484 0_1 Nc1ccc2[nH]c[nH+]c2c1 mol4484 1_1 [NH3+]c1ccc2[nH]cnc2c1 mol4484 1_2 [NH3+]c1ccc2[nH]c[nH+]c2c1 mol4484 2_1 Nc1ccc2[n-]cnc2c1 mol4484 -1_1