COc1cc(CC(=O)O)ccc1O    mol752    0_1
COc1cc(CC(=O)O)ccc1[O-]    mol752    -1_1
COc1cc(CC(=O)[O-])ccc1O    mol752    -1_2
COc1cc(CC(=O)[O-])ccc1[O-]    mol752    -2_1