Gro(a2-4)[Gro(a1-2)Gro(a1-2)[Glc(b1-6)Glc(a1-4)GlcN(a1-4)]GalA(a1-3)Gro(a1-3)[Glc(b1-4)]Gro(a1-5)]Kdo(a2-6)GlcN(b1-6)GlcN(a1-