(19)

(11)

EP 0 083 373 A1

(12)

(43) Date of publication: 13.07.1983 Bulletin 1983/28 (21) Application number: 82902562.0 (22) Date of filing: 12.07.1982

(51) International Patent Classification (IPC):  A61K 31/ 46( . ) C07D 451/ 00( . ) (86) International application number: PCT/US1982/000941 (87) International publication number: WO 1983/000286 (03.02.1983 Gazette 1983/04)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 15.07.1981 US 19810283447 (71) Applicant: Key Pharmaceuticals, Inc. Miami, Florida 33169 (US)	(72) Inventor: KEITH, Alec Dell Miami, FL 33169 (US) (74) Representative: Werner, Hans-Karsten, Dr., et al  Patentanwälte Von Kreisler-Selting-Werner Postfach 10 22 41 D-50462 Köln D-50462 Köln (DE)