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