CC1=CC(=O)C(O)=C(C)C1=O    mol30532    0_1
[CH2-]C1=CC(=O)C(O)=C(C)C1=O    mol30532    -1_1
[CH2-]C1=C(O)C(=O)C=C(C)C1=O    mol30532    -1_2
CC1=CC(=O)C([O-])=C(C)C1=O    mol30532    -1_3