[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][Branch1][=Branch2][C][C][NH1+1][=C][Branch1][C][N][N][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a zwitterion obtained by transfer of a proton from the carboxy to the guanidino group of 5-guanidino-3-methyl-2-oxopentanoic acid; major species at pH 7.3. It is a tautomer of a 5-guanidino-3-methyl-2-oxopentanoic acid."}]