[{"from": "human", "value": "Describe this molecule. [C][NH1+1][=C][Branch1][C][N][N][C][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is the zwitterionic form of N(omega)-methyl-L-arginine in which the imino nitrogen has been protonated. It is a conjugate acid of a N(omega)-methyl-L-arginine zwitterion."}]