Kdo(a2-4)[GlcNAc(a1-4)GlcA(a1-4)[Rha(a1-3)Rha(a1-3)Rha(a1-3)Rha(a1-8)Kdo(a2-5)]Kdo(a2-5)]Kdo(a2-6)GlcN(b1-6)GlcN(a1-