[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a heparin tetrasaccharide consisting of 4-deoxy-2-O-sulfo-L-threo-hex-4-enopyranuronosyl, 2-deoxy-6-O-sulfo-2-(sulfoamino)-D-glucopyranosyl, 2-O-sulfo-L-idopyranuronosyl, and 2-deoxy-2-(sulfoamino)-alpha-D-glucopyranose joined in sequence by alpha-(1->4) linkages. Sequence: DUA2S-GlcNS6S-IdoA2S-GlcNS. It is a heparin tetrasaccharide, an amino tetrasaccharide and an oligosaccharide sulfate."}, {"from": "gpt", "value": "[C][=C][Branch2][=Branch2][=Branch1][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][#Branch1][C][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@H1][C@@H1][Branch2][Branch1][#Branch1][C@H1][Branch2][Ring2][#Branch2][C@@H1][Branch1][#Branch2][O][C@H1][Ring1][=Branch1][C][=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][O][S][=Branch1][C][=O][=Branch1][C][=O][O][O][C][O][S][=Branch1][C][=O][=Branch1][C][=O][O][C][=Branch1][C][=O][O]"}]