[{"from": "human", "value": "Please give me some details about this molecule. [C][C@H1][C@H1][Branch2][Branch2][O][C@H1][Branch2][Branch2][=Branch1][C@@H1][Branch2][#Branch1][P][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][O][C@@H1][C@H1][Branch2][Ring2][Ring2][C@H1][Branch2][Ring1][#C][C@H1][Branch2][Ring1][=Branch2][O][C@H1][Ring1][=Branch1][O][C@@H1][C@H1][Branch1][=C][O][C][Branch1][=Branch2][C@@H1][Branch1][Branch1][C@H1][Ring1][=Branch1][O][O][O][C][O][C][O][O][O][C@@H1][C@@H1][Branch2][Ring2][=Branch1][C@H1][Branch1][=N][C@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][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][N][C][=Branch1][C][=O][C][O][O][O]"}, {"from": "gpt", "value": "The molecule is an amino pentasaccharide comprised of a tetrasaccharide chain of beta-D-galactosyl, N-acetyl-alpha-D-galactosaminyl, beta-D-galactosyl and D-glucosyl residues linked sequentially (1->3), (1->3) and (1->4), with an alpha-L-fucosyl residue linked (1->2) to the galactosyl residue proximal to the reducing-end glucosyl residue. It has a role as an epitope. It is an amino pentasaccharide and a galactosamine oligosaccharide."}]