[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a D-alpha-amino acid zwitterion resulting from a transfer of a proton from the carboxy group to the amino group of D-alloisoleucine; major species at pH 7.3. It is an enantiomer of a L-alloisoleucine zwitterion. It is a tautomer of a D-alloisoleucine."}, {"from": "gpt", "value": "[C][C][C@H1][Branch1][C][C][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]