Ic1ccccc1Nc1c2ccccc2nc2ccccc12 mol20203 0_1 Ic1ccccc1[NH2+]c1c2ccccc2nc2ccccc12 mol20203 1_1 Ic1ccccc1Nc1c2ccccc2[nH+]c2ccccc12 mol20203 1_2