[{"from": "human", "value": "Please give me some details about this molecule. [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch1][#C][C@H1][Branch1][O][C@H1][Branch1][=Branch1][O][C][Ring1][=Branch1][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 disaccharide consisting of D-galactopyranose at the non-reducing end joined by a (1->3) glycosidic linkage to N-acetyl-D-galactopyranosamine. It has a role as an epitope. It is a D-Galp-(1->3)-D-GalpNAc, a galactosamine oligosaccharide and an amino disaccharide."}]