[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][Branch1][C][C][C][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is a D-alpha-amino acid zwitterion arising from the transfer of a proton from the carboxy to the amino group of D-leucine; major species at pH 7.3. It is a tautomer of a D-leucine."}]