CC1[C@](C)(C(=O)O)[C@@]1(C)C(=O)O    mol22561    0_1
CC1[C@](C)(C(=O)[O-])[C@@]1(C)C(=O)O    mol22561    -1_1
CC1[C@](C)(C(=O)[O-])[C@@]1(C)C(=O)[O-]    mol22561    -2_1