[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C@@H1][C@@H1][Branch2][=Branch1][=Branch2][C][C@H1][Branch2][=Branch1][Ring1][C@H1][Branch1][Ring2][O][Ring1][=Branch1][O][C@H1][C@@H1][Branch2][Branch1][=Branch1][C@H1][Branch2][Ring2][S][O][C@@H1][Branch1][Branch1][C@H1][Ring1][=Branch1][O][O][C@H1][C@@H1][Branch2][Ring1][P][O][C@H1][Branch1][=Branch2][C@@H1][Branch1][Branch1][C@@H1][Ring1][=Branch1][O][O][O][C@H1][C@H1][Branch1][#C][C@H1][Branch1][#Branch2][O][C@@H1][Branch1][Branch1][C@@H1][Ring1][=Branch1][O][O][C][O][O][C][C][O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a tetrasaccharide consisting of alpha-D-abequose, alpha-D-mannose, alpha-L-rhamnose and alpha-D-galactose residues linked sequentially (1->3), (1->4) and (1->3); epitope of the O-antigen polysaccharide in Salmonella. It has a role as an epitope."}]