[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is an L-alpha-amino acid zwitterion obtained by transfer of a proton from the carboxy to the amino group of L-vinylglycine; major species at pH 7.3. It is a tautomer of a L-vinylglycine."}, {"from": "gpt", "value": "[C][=C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]