[{"from": "human", "value": "Generate a molecule based on this description. The molecule is zwitterionic form of homocysteine arising from transfer of a proton from the carboxy to the amino group; major species at pH 7.3. It is a tautomer of a L-glutamic 5-semialdehyde."}, {"from": "gpt", "value": "[C][Branch1][O][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1][C][=O]"}]