[{"from": "human", "value": "Please give me some details about this molecule. [C][C@@H1][C@@H1][Branch2][O][#Branch2][C@@H1][Branch2][O][Branch1][C@H1][Branch2][#Branch2][O][C@H1][Branch1][Ring2][O][Ring1][=Branch1][O][C@@H1][C@@H1][Branch2][=Branch2][=C][C@H1][Branch2][=Branch2][=Branch2][C@H1][Branch1][#Branch2][O][C@@H1][Ring1][=Branch1][C][=Branch1][C][=O][O][O][C@H1][C@H1][Branch2][Branch2][=Branch1][C@H1][Branch2][#Branch1][=N][O][C@@H1][Branch1][Branch1][C@@H1][Ring1][=Branch1][O][O][C][C][S][S][C][C][O][C@@H1][C@@H1][Branch2][=Branch1][#Branch1][C@H1][Branch1][S][C@H1][Branch1][N][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][=Branch1][C][=O][O][O][O][C@@H1][C@@H1][Branch2][Ring2][=C][C@H1][Branch2][Ring2][=Branch2][C@H1][Branch1][N][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][=Branch1][C][=O][O][O][C@@H1][C@@H1][Branch1][S][C@H1][Branch1][N][C@H1][Branch1][Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][N][O][N][C][=Branch1][C][=O][C][O][O][O][C][=Branch1][C][=O][O][O][O][O][N][C][=Branch1][C][=O][C][O][N]"}, {"from": "gpt", "value": "The molecule is an oligosaccharide derivative consisting of two 2-acetamido-4-amino-2,4-dideoxy-alpha-D-fucosyl-(1->4)-alpha-D-galacturonosyl-(1->3)-alpha-D-galacturonosyloxy trisaccharide units linked via a dithiodiethyl divalent group. One of a panel of synthetic oligosaccharide derivatives designed to reveal a critical role of the rare aminosugar 2-acetamido-4-amino-2,4-dideoxy-D-fucose (2-acetamido-4-amino-2,4,6-trideoxy-D-galactose; D-AAT) for serotype 1 immune recognition (PMID:29632881). It is an organic disulfide and an oligosaccharide derivative."}]