[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a D-alpha-amino acid zwitterion arising from transfer of a proton from the carboxy to the amino group of D-homoserine; major species at pH 7.3. It is a tautomer of a D-homoserine."}, {"from": "gpt", "value": "[C][Branch1][Ring1][C][O][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]