CC(C)(C)OC(=O)N[C@H](CO)C(=O)O    mol35027    0_1
CC(C)(C)OC(=O)[N-][C@H](CO)C(=O)O    mol35027    -1_1
CC(C)(C)OC(=O)N[C@H](C[O-])C(=O)O    mol35027    -1_2
CC(C)(C)OC(=O)N[C@H](CO)C(=O)[O-]    mol35027    -1_3