[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. Implicated in food discolouration (enzymatic browning)."}, {"from": "gpt", "value": "[C][=C][C][=Branch1][C][=O][C][=Branch1][C][=O][C][=C][Ring1][Branch2][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}]