Abstract: A compound for local, i.e. intratumoral or intracavitary administration, for targeting tumors comprising dextran, the charge of which has been modified through covalent binding of charged groups, such as charged amino acids. The compound further comprises a functional group for treating or imaging the tumor.

Abstract: Polysaccharide-somatostatin analogs of the formula: wherein the somatostatin analog is directly or indirectly coupled from a terminal N-amino group of the somatostatin analog to a polysaccharide, and the polysaccharide-somatostatin analog is provided with an effective negative charge. The compounds are useful in diagnosing and treating cancers.

Abstract: The present invention is related to process for producing radioiodinate neuroreceptor agents with improves yields. In said process the trialkyltin group of the precursor of the neuroreceptor agent is replaced by radioiodine in the presence of an oxidation agent, preferably chloramine T in a pH adjusted by a buffering system comprising inorganic or organic acids and their salts. The end-products are subsequently separated from the by-products using chromatographic separation methods such as high performance liquid chromatography (HPLC), wherein the mobile solvent phase comprises a mixture of ethanol and water having a pH of 1-6. The improved yield are obtainable by preventing the formation of volatile radioactive by-products and by using a non-toxic solvent system in the chromatographic separation process, which simplifies the down stream processing of the end product.

Abstract: A process for producing a carrier free radio halogenated 3-(5-cyclopropyl-1,2,4-oxadiazol-3-yl)-5,6-dihydro-5-methyl-6-oxo-4H-imida zo[1,5-a][1,4]-benzodiazepine of formula (II) where R.sup.1 is a radioactive halogen and R.sup.1 may be at 7, 8, 9 or 10 substituent. The above compound is used in a pharmaceutical composition for nuclear medicine examination.