Kdo(a2-4)Kdo(a2-4)[Glc(a1-2)Gal(a1-3)[Gal(a1-6)]Glc(a1-3)[Hep(?1-7)]Hep(b1-3)Hep(b1-5)]Kdo(a2-6)GlcN(b1-6)GlcN(a1-