COc1cc(C(=O)O)ccc1O    mol1783    0_1
COc1cc(C(=O)[O-])ccc1O    mol1783    -1_1
COc1cc(C(=O)O)ccc1[O-]    mol1783    -1_2
COc1cc(C(=O)[O-])ccc1[O-]    mol1783    -2_1