?-D-GlcpNAc-(1->?)-?-D-Manp-(1->?)[?-D-GlcpNAc-(1->?)-?-D-Manp-(1->?)]-alpha-D-Manp-(1->4)-?-D-GlcpNAc-(1->?)-?-D-GlcpNAc-(1->
