COc1cc(C=CC(=O)O)ccc1O    mol21792    0_1
COc1cc(C=CC(=O)[O-])ccc1O    mol21792    -1_1
COc1cc(C=CC(=O)O)ccc1[O-]    mol21792    -1_2
COc1cc(C=CC(=O)[O-])ccc1[O-]    mol21792    -2_1