[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is an oligosaccharide derivative consisting of two 4,6-O-[(1R)-1-carboxyethylidene]-beta-D-galactosyloxy 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."}, {"from": "gpt", "value": "[C][C@][Branch2][=Branch1][N][O][C][C@@H1][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C@@H1][Branch2][Branch1][=C][C@H1][Branch2][Branch1][=Branch2][C@@H1][Branch1][Ring2][O][Ring1][#Branch1][O][C][C][C][C][C][C][S][S][C][C][C][C][C][C][O][C@H1][C@@H1][Branch2][Ring1][=N][C@H1][Branch2][Ring1][Branch2][C@@H1][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][C@@][Branch1][Ring2][O][Ring1][#Branch1][Branch1][C][C][C][=Branch1][C][=O][O][O][O][O][O][C][=Branch1][C][=O][O]"}]