CC1=C(C)C(=O)C(O)=C(C)C1=O    mol30565    0_1
CC1=C(C)C(=O)C([O-])=C(C)C1=O    mol30565    -1_1
[CH2-]C1=C(C)C(=O)C(C)=C(O)C1=O    mol30565    -1_2
[CH2-]C1=C(O)C(=O)C(C)=C(C)C1=O    mol30565    -1_3
[CH2-]C1=C(C)C(=O)C(O)=C(C)C1=O    mol30565    -1_4