The molecule is an unsaturated heparin disaccharide that is 2N,6-O-disulfo-alpha-D-glucosamine in which the hydroxy group at position 4 has been glycosylated by 4-deoxy-2-O-sulfo-alpha-L-threo-hex-4-enopyranuronic acid. Sequence: DUA2S-GlcNS6S. It is an unsaturated heparin disaccharide, an oligosaccharide sulfate and a monocarboxylic acid. It is a conjugate acid of a heparin disaccharide I-S(4-).
(2R,3R,4S)-2-[(2R,3S,4R,5R,6S)-4,6-dihydroxy-5-(sulfoamino)-2-(sulfooxymethyl)oxan-3-yl]oxy-4-hydroxy-3-sulfooxy-3,4-dihydro-2H-pyran-6-carboxylic acid