O=C([O-])c1[nH+]cnc2ccccc12    mol7855    0_1
O=C([O-])c1nc[nH+]c2ccccc12    mol7855    0_2
O=C(O)c1ncnc2ccccc12    mol7855    0_3
O=C([O-])c1ncnc2ccccc12    mol7855    -1_1