Fuca1-3(Galb1-4)GlcNAcb1-?(NeuAca2-6Gal?1-?GlcNAc?1-?)Mana1-3(NeuAca2-6Galb1-4GlcNAcb1-2Mana1-6)Manb1-4GlcNAcb1-4(Fuca1-6)GlcNAcb