[{"from": "human", "value": "Provide a description of this molecule. [C][Branch2][Branch1][S][C@@H1][C@@H1][Branch2][Branch1][#Branch2][C@@H1][Branch2][Branch1][Branch1][C@H1][Branch2][Ring2][S][C@H1][Branch1][Ring2][O][Ring1][=Branch1][O][C@H1][C@H1][Branch2][Ring2][Ring1][C@H1][Branch2][Ring1][=N][O][C@H1][Branch1][Branch1][C@@H1][Ring1][=Branch1][O][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][O][O][O]"}, {"from": "gpt", "value": "The molecule is a linear trisaccharide comprising D-glucose (at the reducing end) having an alpha-D-galactosyl-(1->3)-beta-D-galactosyl moiety at the 4-position. It has a role as a carbohydrate allergen."}]