[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is the cation obtained by protonation of the imine nitrogen of (5S)-5-methyl-L-arginine. It is a conjugate acid of a (5S)-5-methyl-L-arginine."}, {"from": "gpt", "value": "[C][C@@H1][Branch1][N][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][NH1+1][=C][Branch1][C][N][N]"}]