[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a tetrapeptide composed of L-alanine, L-leucine, and two L-aspartic acid units joined in sequence by peptide linkages. It has a role as a metabolite. It is functionally related to a L-alanine, a L-aspartic acid and a L-leucine."}, {"from": "gpt", "value": "[C][C@@H1][Branch2][Ring2][S][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][Branch1][C][C][C][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O][N]"}]