Oc1nccc2cccnc12 mol1421 0_1 [O-]c1nccc2ccc[nH+]c12 mol1421 0_2 Oc1[nH+]ccc2cccnc12 mol1421 1_1 Oc1nccc2ccc[nH+]c12 mol1421 1_2 [O-]c1nccc2cccnc12 mol1421 -1_1