The molecule is a lipid A comprising lipid IVA glycosylated with two 3-deoxy-D-manno-octulosonic acid (KDO) residues and carrying an additional 4-amino-4-deoxy-beta-L-arabinopyranosyl esterifying group. It is a conjugate acid of a beta-L-Ara4N-(KDO)2-lipid IVA(4-).
(2R,4R,5R,6R)-2-[(2R,4R,5R,6R)-2-[[(2R,3S,4R,5R,6R)-3-[[(2R,3R,4S,5S)-5-amino-3,4-dihydroxyoxan-2-yl]oxy-hydroxyphosphoryl]oxy-6-[[(2R,3S,4R,5R,6R)-3-hydroxy-5-[[(3R)-3-hydroxytetradecanoyl]amino]-4-[(3R)-3-hydroxytetradecanoyl]oxy-6-phosphonooxyoxan-2-yl]methoxy]-5-[[(3R)-3-hydroxytetradecanoyl]amino]-4-[(3R)-3-hydroxytetradecanoyl]oxyoxan-2-yl]methoxy]-2-carboxy-6-[(1R)-1,2-dihydroxyethyl]-5-hydroxyoxan-4-yl]oxy-6-[(1R)-1,2-dihydroxyethyl]-4,5-dihydroxyoxane-2-carboxylic acid