CC(C)C[C@@H](NC(=O)OC(C)(C)C)C(=O)O    mol34456    0_1
CC(C)C[C@@H]([N-]C(=O)OC(C)(C)C)C(=O)O    mol34456    -1_1
CC(C)C[C@@H](NC(=O)OC(C)(C)C)C(=O)[O-]    mol34456    -1_2