CC(C)(C(=O)O)C(=O)C(=O)O    mol9567    0_1
CC(C)(C(=O)O)C(=O)C(=O)[O-]    mol9567    -1_1
CC(C)(C(=O)[O-])C(=O)C(=O)O    mol9567    -1_2
CC(C)(C(=O)[O-])C(=O)C(=O)[O-]    mol9567    -2_1