[{"from": "human", "value": "Provide a description of this molecule. [C][C@H1][C@@H1][Branch2][Branch1][#Branch2][C@H1][Branch2][Ring1][S][C@H1][Branch2][Ring1][O][C@H1][Branch1][Ring2][O][Ring1][=Branch1][O][C@@H1][C@H1][Branch1][=C][O][C@H1][Branch1][=Branch2][C@@H1][Branch1][Branch1][C@H1][Ring1][=Branch1][O][O][O][C][O][O][O][C@@H1][C@@H1][Branch1][P][C@H1][Branch1][=N][C@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][O][O][O][C@H1][C@@H1][Branch2][=Branch1][#Branch1][C@H1][Branch1][=N][C@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][O][C@H1][C@@H1][Branch2][Ring2][N][C@H1][Branch2][Ring2][#Branch1][C@@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][C@H1][C@@H1][Branch1][P][C@H1][Branch1][=N][C@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][O][N][C][=Branch1][C][=O][C][O][N][C][=Branch1][C][=O][C][O]"}, {"from": "gpt", "value": "The molecule is a polysaccharide derivative with a repeating unit consisting of beta-D-galactosyl, beta-D-rhamnoosyl and beta-D-glucosyl residues all linked (1->4), to the galactosyl residue of which is attached an N-acetyl-beta-D-galactosaminyl-(1->4)-N-acetyl-beta-D-glucosaminyl disaccharide unit via a (1->3) linkage, while to the rhamnosyl residue is linked (1->3) an alpha-D-galactosyl residue, with all repeating units being linked (1->4). Desialylated polysaccharide of Streptococcus suis serotype 1/2."}]