The molecule is a lipid A derivative, prepared from Campylobacter jejuni HS:19, in which each of its two glucosaminyl units is substituted on nitrogen by a 3-(2-hydroxytetracosanoyloxy)octadecanoyl unit.
[(3R)-1-[[(2R,3R,4R,5S,6R)-4,5-dihydroxy-6-[[(2R,3R,4R,5S,6R)-4-hydroxy-6-(hydroxymethyl)-3-[[(3R)-3-(2-hydroxytetracosanoyloxy)octadecanoyl]amino]-5-phosphonooxyoxan-2-yl]oxymethyl]-2-phosphonooxyoxan-3-yl]amino]-1-oxooctadecan-3-yl] 2-hydroxytetracosanoate