[{"from": "human", "value": "Generate a molecule based on this description. The molecule is zwitterionic form of O-(3-O-D-galactosyl-N-acetyl-beta-D-galactosaminyl)-L-serine arising from transfer of a proton from the carboxy to the amino group; major species at pH 7.3. It is a tautomer of an O-(3-O-D-galactosyl-N-acetyl-beta-D-galactosaminyl)-L-serine."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][Ring1][#Branch2][C@H1][Branch2][Ring1][Branch1][C@H1][Branch1][S][O][C@H1][Ring1][=Branch1][O][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1][C][O][O][O][C][C@@H1][Branch1][P][C@H1][Branch1][=N][C@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][O][O]"}]