[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an N-acetyl-amino acid that is the N(alpha)-acetyl derivative of citrulline. It is a member of ureas, a monocarboxylic acid and a N-acetyl-amino acid. It is functionally related to a citrulline."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][C][Branch1][#Branch2][C][C][C][N][C][=Branch1][C][=O][N][C][=Branch1][C][=O][O]"}]