[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is zwitterionic form of S-(5-deoxy-D-ribos-5-yl)-L-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 S-(5-deoxy-D-ribos-5-yl)-L-homocysteine."}, {"from": "gpt", "value": "[C][Branch2][Ring1][Ring2][C][S][C][C@@H1][C@H1][Branch1][N][C@H1][Branch1][Branch2][C][Branch1][Ring2][O][Ring1][Branch1][O][O][O][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]