[{"from": "human", "value": "Generate a molecule based on this description. The molecule is an amino acid zwitterion obtained by transfer of a proton from the amino to the carboxy group of L-3-oxoalanine; major microspecies at pH 7.3 (according to Marvin v 6.2.0.). It is a tautomer of a L-3-oxoalanine."}, {"from": "gpt", "value": "[C][=Branch1][C][=O][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]