[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][Branch1][Branch2][C@H1][Branch2][Branch1][Ring1][C@H1][Branch2][Ring2][=N][O][C@H1][Ring1][=Branch1][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][O][C@H1][Branch1][=Branch2][C@@H1][Branch1][Branch1][C@H1][Ring1][=Branch1][O][O][O][C][O][C][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]"}, {"from": "gpt", "value": "The molecule is an amino tetrasaccharide consisting of beta-D-galactose, N-acetyl-beta-D-galactosamine, beta-D-galactose and beta-D-glucose residues in a linear (1->3), (1->4), (1->4) sequence. It is the carbohydrate portion of ganglioside GA1. It has a role as an epitope. It is an amino tetrasaccharide, a galactosamine oligosaccharide and a beta-D-Galp-(1->3)-beta-D-GalpNAc-(1->4)-beta-D-Galp-(1->4)-D-Glcp."}]