[{"from": "human", "value": "What can you tell me about this molecule? [C][C][=Branch1][C][=O][N][13C@@H1][Branch1][#Branch1][13CH2][13C][=Branch1][C][=O][O][13C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a (13)C-modified compound that is N-acetyl-L-aspartic acid in which the carbon atoms at postions 1, 2, 3 and 4 are present as their (13)C isotopes. Used in biological studies for metabolic alterations associated with schizophrenia. It is a (13)C-modified compound and a N-acetyl-L-aspartic acid."}]