[{"from": "human", "value": "Provide a brief overview of this molecule. [C][N+1][Branch1][C][C][Branch1][C][C][C][C][Branch1][#Branch1][C][C][=Branch1][C][=O][O][O]"}, {"from": "gpt", "value": "The molecule is an amino acid derivative.  Carnitine facilitates long-chain fatty acid entry into mitochondria, delivering substrate for oxidation and subsequent energy production. Fatty acids are utilized as an energy substrate in all tissues except the brain."}]