beta-D-GlcpNAc-(1->2)[beta-D-GlcpNAc-(1->4)]-alpha-D-Manp-(1->3)beta-D-GlcpNAc-(1->4)[?-D-Manp-(1->?)-alpha-D-Manp-(1->6)]-beta-D-Manp-(1->4)-beta-D-GlcpNAc-(1->4)-D-GlcNAc(?->