[{"from": "human", "value": "Provide a brief overview of this molecule. [C@H1][Branch2][Ring1][#Branch1][C@@H1][Branch2][Ring1][C][C@@H1][Branch1][=C][O][C][Branch1][Branch1][C@H1][Ring1][=Branch1][O][C][=Branch1][C][=O][O-1][O][O][O].[Na+1]"}, {"from": "gpt", "value": "The molecule is a copolymer macromolecule composed of homopolymeric blocks of 1->4-linked homopolymeric blocks of 1->4-linked sodium beta-D-mannuronate and sodium alpha-L-guluronate residues, covalently linked together in different sequences or blocks. The sodium salt of alginic acid. It has a role as a hematologic agent. It is an organic sodium salt and a copolymer macromolecule. It contains an alginate."}]