Kdo(a2-4)[Kdo(a2-6)GlcN(a1-4)GlcN(a1-4)GalA(a1-3)[GalA(b1-7)Gro(a1-7)]Gro(a1-3)[GalA(b1-6)Glc(b1-4)]Gro(a1-5)]Kdo(a2-