CC1=C(C)C(=O)C(O)=CC1=O    mol30531    0_1
[CH2-]C1=C(C)C(=O)C=C(O)C1=O    mol30531    -1_1
[CH2-]C1=C(C)C(=O)C(O)=CC1=O    mol30531    -1_2
CC1=C(C)C(=O)C([O-])=CC1=O    mol30531    -1_3