The molecule is a lipid A oxoanion obtained via deprotonation of the carboxy and phosphate OH groups of L-alpha-D-Hep-(1->5)-[alpha-Kdo-(2->4)]-alpha-Kdo-(2->6)-lipid A; major species at pH 7.3. It is a conjugate base of a heptosyl-(KDO)2-lipid A.
(2R,4R,5R,6R)-2-[(2R,4R,5R,6R)-2-carboxylato-6-[(1R)-1,2-dihydroxyethyl]-5-[(2R,3S,4S,5S,6R)-6-[(1S)-1,2-dihydroxyethyl]-3,4,5-trihydroxyoxan-2-yl]oxy-2-[[(2R,3S,4R,5R,6R)-5-[[(3R)-3-dodecanoyloxytetradecanoyl]amino]-6-[[(2R,3S,4R,5R,6R)-3-hydroxy-5-[[(3R)-3-hydroxytetradecanoyl]amino]-4-[(3R)-3-hydroxytetradecanoyl]oxy-6-phosphonatooxyoxan-2-yl]methoxy]-3-phosphonatooxy-4-[(3R)-3-tetradecanoyloxytetradecanoyl]oxyoxan-2-yl]methoxy]oxan-4-yl]oxy-6-[(1R)-1,2-dihydroxyethyl]-4,5-dihydroxyoxane-2-carboxylate