The molecule is a lipid A oxoanion arising from deprotonation of the phosphate OH groups of palmitoyllipid A; major species at pH 7.3. It is a conjugate base of a palmitoyllipid A.
[(2R,3S,4R,5R,6R)-5-[[(3R)-3-dodecanoyloxytetradecanoyl]amino]-6-[[(2R,3S,4R,5R,6R)-5-[[(3R)-3-hexadecanoyloxytetradecanoyl]amino]-3-hydroxy-4-[(3R)-3-hydroxytetradecanoyl]oxy-6-phosphonatooxyoxan-2-yl]methoxy]-2-(hydroxymethyl)-4-[(3R)-3-tetradecanoyloxytetradecanoyl]oxyoxan-3-yl] phosphate