[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][Branch2][Branch1][#Branch2][O][C@H1][Branch1][P][C@@H1][Branch1][Branch1][C@H1][Ring1][=Branch1][O][O][S][=Branch1][C][=O][=Branch1][C][=O][O][O][C@@H1][C@H1][Branch2][Ring1][=Branch1][O][C@@H1][Branch1][P][C@@H1][Branch1][Branch1][C@H1][Ring1][=Branch1][O][N][S][=Branch1][C][=O][=Branch1][C][=O][O][O][C][O][S][=Branch1][C][=O][=Branch1][C][=O][O][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an unsaturated heparin disaccharide that is 2N,6-O-disulfo-alpha-D-glucosamine in which the hydroxy group at position 4 has been glycosylated by 4-deoxy-2-O-sulfo-alpha-L-threo-hex-4-enopyranuronic acid. Sequence: DUA2S-GlcNS6S. It is an unsaturated heparin disaccharide, an oligosaccharide sulfate and a monocarboxylic acid. It is a conjugate acid of a heparin disaccharide I-S(4-)."}]