[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an O-acyl-L-carnitine in which the acyl group is specified as acetoacetyl. It is an O-acyl-L-carnitine and an oxo-fatty acyl-L-carnitine. It is functionally related to an acetoacetic acid."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][C][C][=Branch1][C][=O][O][C@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][N+1][Branch1][C][C][Branch1][C][C][C]"}]