[{"from": "human", "value": "Provide a description of this molecule. [C][N][Branch1][=N][C][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][=Branch1][C][=N][N]"}, {"from": "gpt", "value": "The molecule is a non-proteinogenic L-alpha-amino acid that is L-arginine substituted by a methyl group at N(5)-position. It is a non-proteinogenic L-alpha-amino acid, a member of guanidines and a L-arginine derivative."}]