(19)

(11)

EP 0 606 295 A1

(12)

(43) Date of publication: 20.07.1994 Bulletin 1994/29 (21) Application number: 92920263.0 (22) Date of filing: 02.10.1992

(51) International Patent Classification (IPC):  C07D 487/ 22( . ) (86) International application number: PCT/EP1992/002283 (87) International publication number: WO 1993/007150 (15.04.1993 Gazette 1993/10)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU NL SE (30) Priority: 04.10.1991 DE 19914132893 16.12.1991 DE 19914141381 (71) Applicants: SANDOZ-ERFINDUNGEN Verwaltungsgesellschaft m.b.H. A-1235 Wien (AT) SANDOZ-PATENT-GMBH D-79539 Lörrach (DE) SANDOZ LTD. CH-4002 Basel (CH)	(72) Inventors: EHRHARDT, Claus D-7851 Rümmingen (DE) GIGER, Karl, Andreas, Rudolf CH-4132 Muttenz (CH)