[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a leucine derivative that is leucine substituted by a hydroxy group at position 4. It is a leucine derivative, a tertiary alcohol and a non-proteinogenic alpha-amino acid. It is functionally related to a leucine."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][Branch1][O][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N][O]"}]