CC(C)(C)[NH+](CC(=O)[O-])CC(=O)O    mol34433    0_1
CC(C)(C)N(CC(=O)O)CC(=O)O    mol34433    0_2
CC(C)(C)N(CC(=O)[O-])CC(=O)O    mol34433    -1_1
CC(C)(C)[NH+](CC(=O)[O-])CC(=O)[O-]    mol34433    -1_2