The molecule is an lipid IVA oxoanion arising from deprotonation of the phosphate OH groups of lipid IVB; major species at pH 7.3.
[(2R,3R,4R,5S,6R)-3-[[(3R)-3-hexadecanoyloxytetradecanoyl]amino]-5-hydroxy-6-[[(2R,3R,4R,5S,6R)-6-(hydroxymethyl)-3-[[(3R)-3-hydroxytetradecanoyl]amino]-4-[(3R)-3-hydroxytetradecanoyl]oxy-5-phosphonatooxyoxan-2-yl]oxymethyl]-4-[(3R)-3-hydroxytetradecanoyl]oxyoxan-2-yl] phosphate