CC1(C)CC(C)(C)[C@H](C(=O)O)C1=O    mol34899    0_1
CC1(C)CC(C)(C)[C-](C(=O)O)C1=O    mol34899    -1_1
CC1(C)CC(C)(C)[C@H](C(=O)[O-])C1=O    mol34899    -1_2