[{"from": "human", "value": "Provide a description of this molecule. [C][Branch1][=C][C@H1][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1][O][F]"}, {"from": "gpt", "value": "The molecule is zwitterionic form of 4-fluoro-L-threonine. It is a tautomer of a 4-fluoro-L-threonine."}]