[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. 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."}, {"from": "gpt", "value": "[C][Branch1][#Branch2][C@@H1][Branch1][=Branch1][13C][=Branch1][C][=O][O][N][13C][=Branch1][C][=O][O]"}]