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