[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C@H1][C@@H1][Branch2][N][C][C@H1][Branch2][O][=N][C@H1][Branch2][=Branch2][=C][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][O][C@H1][C@H1][Branch2][Branch2][S][O][C@H1][Branch2][Branch2][#Branch2][C@@H1][Branch2][#Branch1][S][C@H1][Ring1][=Branch1][O][C@H1][C@@H1][Branch2][#Branch1][=Branch1][C@H1][Branch2][=Branch1][P][C@@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][C@@H1][C@@H1][Branch2][Branch1][#Branch2][C@@H1][Branch1][N][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][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][=Branch1][C][=O][C][O][O][N][C][=Branch1][C][=O][C][O][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][O][C][=Branch1][C][=O][C][O][O]"}, {"from": "gpt", "value": "The molecule is a polysaccharide derivative with a repeating unit consisting of alpha-D-galactosyl, 2-O-acetyl-beta-L-rhamnosyl, beta-D-glucosyl and N-acetyl-beta-D-galactosaminyl residues linked sequentially (1->3), (1->4) and (1->3), to the galactosyl and N-acetyl-beta-D-galactosaminyl residues of which are attached respectively a beta-D-galactosyl residue and an N-acetyl-alpha-D-glucosaminyl-(1->2)-alpha-L-rhamnosyl disaccharide unit via (1->2) and (1->4) linkages respectively, with all repeating units being linked (1->6). The repeating unit corresponds to that of the capsular polysaccharide of Streptococcus pneumoniae serotype 7F (ST7F)."}]