[{"from": "human", "value": "Provide a brief overview of this molecule. [C][Branch2][Ring2][=Branch1][C][C][C][S][S][C][C][C][C][C][C][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][C][C][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 an oligosaccharide derivative consisting of two alpha-D-galacturonosyloxy monosaccharide units linked via a dithiodihexyl 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 oligosaccharide derivative and an organic disulfide."}]