OCCNc1c2ccccc2nc2c1oc1ccccc12 mol16593 0_1 OCCNc1c2ccccc2[nH+]c2c1oc1ccccc12 mol16593 1_1 OCC[NH2+]c1c2ccccc2nc2c1oc1ccccc12 mol16593 1_2