[{"from": "human", "value": "Please give me some details about this molecule. [C][Branch1][#Branch2][C@@H1][Branch1][=Branch1][13C][=Branch1][C][=O][O][N][13C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is the L-enantiomer of aspartic acid-1,4-(13)C2. It is an enantiomer of a D-aspartic acid-1,4-(13)C2."}]