The molecule is a lipid IVA oxoanion arising from deprotonation of the phosphate OH groups and protonation of the amino group of 7-O-[(2-aminoethyl)phosphoryl]-alpha-Kdo-(2->4)-alpha-Kdo-(2->6)-lipid IVA; major species at pH 7.3. It is a conjugate base of a 7-O-[(2-aminoethyl)phosphoryl]-alpha-Kdo-(2->4)-alpha-Kdo-(2->6)-lipid IVA.
(2R,4R,5R,6S)-6-[(1R)-1-[2-azaniumylethoxy(oxido)phosphoryl]oxy-2-hydroxyethyl]-2-[(2R,4R,5R,6R)-2-carboxylato-6-[(1R)-1,2-dihydroxyethyl]-5-hydroxy-2-[[(2R,3S,4R,5R,6R)-6-[[(2R,3S,4R,5R,6R)-3-hydroxy-5-[[(3R)-3-hydroxytetradecanoyl]amino]-4-[(3R)-3-hydroxytetradecanoyl]oxy-6-phosphonatooxyoxan-2-yl]methoxy]-5-[[(3R)-3-hydroxytetradecanoyl]amino]-4-[(3R)-3-hydroxytetradecanoyl]oxy-3-phosphonatooxyoxan-2-yl]methoxy]oxan-4-yl]oxy-4,5-dihydroxyoxane-2-carboxylate