CC1=C(O)C(=O)C(C(C)C)=CC1=O    mol30607    0_1
CC1=C(O)C(=O)C([C-](C)C)=CC1=O    mol30607    -1_1
[CH2-]C1=C(O)C(=O)C(C(C)C)=CC1=O    mol30607    -1_2
CC1=C([O-])C(=O)C(C(C)C)=CC1=O    mol30607    -1_3