The molecule is a heparin tetrasaccharide consisting of 4-deoxy-2-O-sulfo-L-threo-hex-4-enopyranuronosyl, 2-deoxy-6-O-sulfo-2-(sulfoamino)-D-glucopyranosyl, 2-O-sulfo-L-idopyranuronosyl and 2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopyranose joined in sequence by alpha-(1->4) linkages. Sequence: DUAp2S(1-4)-a-D-GlcNpS6S (1-4)-a-L-IdoAp2S(1-4)-a-D-GlcNpS6S. It is a heparin tetrasaccharide, an amino tetrasaccharide and an oligosaccharide sulfate.
(2R,3R,4S)-2-[(2R,3S,4R,5R,6R)-6-[(2R,3S,4S,5R,6R)-2-carboxy-6-[(2R,3S,4R,5R,6S)-4,6-dihydroxy-5-(sulfoamino)-2-(sulfooxymethyl)oxan-3-yl]oxy-4-hydroxy-5-sulfooxyoxan-3-yl]oxy-4-hydroxy-5-(sulfoamino)-2-(sulfooxymethyl)oxan-3-yl]oxy-4-hydroxy-3-sulfooxy-3,4-dihydro-2H-pyran-6-carboxylic acid