[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is major microspecies at pH 7.3. It is a zwitterion and a L-serine derivative."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][C][C][O][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]