2,3,2',3'-tetrakis(3-hydroxymyristoyl)-D-glucosaminyl-1,6-beta-D-glucosamine 1,4'-bisphosphate 2,3,2',3'-tetrakis-(3-hydroxytetradecanoyl)-D-glucosaminyl-1,6-beta-D-glucosamine-1,4'-bisphosphate LIPID-IV-A lipid IV(A)