?-?-HexpA-(1->3)-?-?-HexpNAc-(1->4)-?-?-HexpA-(1->3)-?-?-HexpNAc-(1->4)-?-?-HexpA-(1->3)-?-?-HexpNAc-(1->4)-?-?-HexpA-(1->3)-?-?-HexpNAc-(1->
