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