O=c1cc(CO)occ1O    mol12902    0_1
O=c1cc(CO)occ1[O-]    mol12902    -1_1
O=c1cc([CH-][O-])occ1O    mol12902    -2_1
O=c1cc([CH-]O)occ1[O-]    mol12902    -2_2
O=c1cc(C[O-])occ1[O-]    mol12902    -2_3