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