[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C@H1][Branch1][#C][C][=Branch1][C][=O][N][C@H1][Branch1][C][C][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is a dipeptide zwitterion that is the zwitterionic form of D-alanyl-D-alanine arising from migration of a proton from the OH of the carboxy terminus to the amino terminus. It has a role as an Escherichia coli metabolite. It is a tautomer of a D-alanyl-D-alanine."}]