NeuGc?2-?Gal?1-?GlcNAc?1-?(NeuAc?2-?Gal?1-?GlcNAc?1-?)Mana1-3(GlcNAcb1-4)(GlcNAc?1-?(NeuGc?2-?Gal?1-?GlcNAc?1-?)Mana1-6)Manb1-4GlcNAcb1-4GlcNAc