[{"from": "human", "value": "Describe this molecule. [C][C][=Branch1][C][=O][N][C@@H1][Branch1][=Branch1][C][C][C][C][N][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an acetyl-L-lysine where the acetyl group is located at the N(2)-posiiton. It has a role as a human metabolite. It is a tautomer of a N(2)-acetyl-L-lysine zwitterion."}]