[{"from": "human", "value": "Describe this molecule. [C][N][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][C][NH3+1]"}, {"from": "gpt", "value": "The molecule is a dipeptide zwitterion obtained by transfer of a proton from the carboxy to the amino terminus of glycylsarcosine. Major microspecies at pH 7.3. It is a tautomer of a glycylsarcosine."}]