C[C@H]1CC=C(O)C1=O    mol9551    0_1
C[C-]1CC=C(O)C1=O    mol9551    -1_1
C[C@H]1CC=C([O-])C1=O    mol9551    -1_2
C[C@H]1[CH-]C=C(O)C1=O    mol9551    -1_3