CC1(C)CC(=O)C=C(O)C1    mol31144    0_1
CC1(C)[CH-]C(=O)C=C(O)C1    mol31144    -1_1
CC1(C)CC(=O)C=C([O-])C1    mol31144    -1_2
CC1(C)[CH-]C(O)=CC(=O)C1    mol31144    -1_3