[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is an amino acid derivative.  Levocarnitine 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. (NCI04)"}, {"from": "gpt", "value": "[C][N+1][Branch1][C][C][Branch1][C][C][C][C@@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][O]"}]