[{"from": "human", "value": "Provide a description of this molecule. [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch1][#C][C@H1][Branch1][O][C@H1][Branch1][=Branch1][O][C@H1][Ring1][=Branch1][O][C][O][O][O][C@H1][C@@H1][Branch2][Ring1][Ring2][C@H1][Branch1][S][C@@H1][Branch1][N][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][C][=Branch1][C][=O][O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a mucopolysaccharide consisting of repeating beta-(1->4)-linked L-iduronyl-(alpha1->3)-N-acetyl-D-galactosamine units. It is a conjugate acid of a dermatan anion."}]