Clc1cc2[nH]c(Cl)nc2cn1 mol7977 0_1 Clc1nc2c[nH+]c(Cl)cc2[nH]1 mol7977 1_1 Clc1cc2[nH]c(Cl)[nH+]c2cn1 mol7977 1_2 Clc1cc2[n-]c(Cl)nc2cn1 mol7977 -1_1