The molecule is an oligosaccharide derivative consisting of two alpha-D-galacturonosyl-(1->3)-alpha-D-galacturonosyloxy disaccharide 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 oligosaccharide derivative and an organic disulfide.
(2S,3R,4S,5R,6S)-6-[(2S,3R,4S,5R,6S)-2-carboxy-6-[2-[2-[(2S,3R,4S,5R,6S)-6-carboxy-4-[(2S,3R,4S,5R,6S)-6-carboxy-3,4,5-trihydroxyoxan-2-yl]oxy-3,5-dihydroxyoxan-2-yl]oxyethyldisulfanyl]ethoxy]-3,5-dihydroxyoxan-4-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acid