[{"from": "human", "value": "Describe this molecule. [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][Ring2][#Branch2][C@H1][Branch2][Ring2][Branch1][C@H1][Branch2][Ring1][#C][O][C@@H1][Ring1][=Branch1][O][C@H1][C@H1][Branch2][Ring1][Ring2][C@H1][Branch1][#C][O][C][Branch1][#Branch2][C@@H1][Ring1][=Branch1][N][C][=Branch1][C][=O][C][O][C][O][O][C][O][O][O]"}, {"from": "gpt", "value": "The molecule is a D-GalpNAc-(1->3)-D-GalpNAc in which the 2-acetamidogalactosyl group (attached to position 3 of the 2-acetamidogalactose moiety) has alpha- configuration."}]