[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is zwitterionic form of L-allothreonine. It is a tautomer of a L-allothreonine."}, {"from": "gpt", "value": "[C][C@@H1][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1][O]"}]