Kdo(a2-4)Kdo(a2-4)[Glc(a1-2)Glc(a1-2)[GlcNAc(a1-3)]Glc(a1-3)[GlcNAc(a1-7)Gro(a1-7)]Gro(a1-3)Gro(a1-5)]Kdo(a2-