The molecule is a disaccharide derivative consisting of a 3-deoxy-alpha-D-manno-oct-2-ulopyranonosyl unit joined via an alpha-(2->4)-linkage to a 5,6-dehydro-3-deoxy-alpha-D-manno-oct-2-ulopyranonosyl unit with an O-allyl group at the anomeric centre.
(2R,4R)-4-[(2R,4R,5R,6R)-2-carboxy-6-[(1R)-1,2-dihydroxyethyl]-4,5-dihydroxyoxan-2-yl]oxy-6-[(1R)-1,2-dihydroxyethyl]-2-prop-2-enoxy-3,4-dihydropyran-2-carboxylic acid