O=C(O)[C@]12CC[C@](C(=O)O)(CC1)CC2    mol11252    0_1
O=C([O-])[C@]12CC[C@](C(=O)O)(CC1)CC2    mol11252    -1_1
O=C([O-])[C@]12CC[C@](C(=O)[O-])(CC1)CC2    mol11252    -2_1