[{"from": "human", "value": "Describe this molecule. [C][Branch2][Ring1][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH2+1][C][C][C][=Branch1][C][=O][O-1][C][NH1+1][=C][Branch1][C][N][N]"}, {"from": "gpt", "value": "The molecule is an amino acid zwitterion obtained from N(2)-(2-carboxyethyl)-L-arginine by the removal of a proton for both of the carboxy groups and the addition of a proton to the alpha-amino group and to the guanidyl group. It is a tautomer of a N(2)-(2-carboxyethyl)-L-arginine."}]