[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C@H1][C@H1][Branch2][Branch2][S][C@H1][Branch2][Branch2][O][C@@H1][Branch2][Branch2][=Branch1][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][O][C@@H1][C@H1][Branch2][#Branch1][Branch2][O][C@H1][Branch2][Ring2][Ring2][C@@H1][Branch2][Ring1][#Branch2][C@H1][Ring1][=Branch1][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][N][C][=Branch1][C][=O][C][O][C@H1][C@H1][Branch2][Ring2][=Branch2][C@H1][Branch2][Ring2][Ring1][O][C@H1][Branch1][Branch1][C@@H1][Ring1][=Branch1][O][O][C@@H1][C@H1][Branch2][Ring1][Ring1][O][C@H1][Branch1][=C][C@@H1][Branch1][Branch1][C@H1][Ring1][=Branch1][O][N][C][=Branch1][C][=O][C][O][C][O][C][O][O][C][O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a branched amino pentasaccharide comprising a linear chain of beta-D-galactose, N-acetyl-beta-D-glucosamine, beta-D-galactose and N-acetyl-beta-D-glucosamine, linked (1->3), (1->3) and (1->4) respectively, with an alpha-L-fucose residue (1->4)-linked to the N-acetyl-beta-D-glucosamine residue at the non-reducing end. It has a role as an epitope. It is an amino pentasaccharide and a glucosamine oligosaccharide."}]