, at least one of them are bifunctional ligand and m or n is an integer of 1 to 6, and at least one...http://www.google.com/patents/US5422095?utm_source=gb-gplus-sharePatent US5422095 - Low molecular weight polysaccharide complexes for radiation diagnosisAdvanced Patent SearchPublication numberUS5422095 APublication typeGrantApplication numberUS 08/222,226Publication dateJun 6, 1995Filing dateApr