(19)

(11)

EP 0 469 061 A1

(12)

(43) Date of publication: 05.02.1992 Bulletin 1992/06 (21) Application number: 90907560.0 (22) Date of filing: 10.04.1990

(51) International Patent Classification (IPC):  A01N( . ) C07D 263/ 14( . ) A01N 43/ 90( . ) C07D 263/ 44( . ) C07D 263/ 52( . ) C07D 413/ 12( . ) C07D 495/ 10( . ) C07D( . ) A01N 43/ 76( . ) A01P 3/ 00( . ) C07D 263/ 46( . ) C07D 413/ 04( . ) C07D 413/ 14( . ) C07D 498/ 10( . ) (86) International application number: PCT/US1990/002076 (87) International publication number: WO 1990/012791 (01.11.1990 Gazette 1990/25)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 21.04.1989 US 19890341741 21.04.1989 US 19890341742 (71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY Wilmington Delaware 19898 (US)	(72) Inventors: ADAMS, John, Benjamin, Jr. Hockessin, DE 19707 (US) GEFFKEN, Detlef D-2000 Hamburg 20 (DE) RAYNER, Dennis, Raymond Centerville, DE 19807 (US) (74) Representative: Hildyard, Edward Martin  Frank B. Dehn & Co. European Patent Attorneys Imperial House 15-19 Kingsway London WC2B 6UZ London WC2B 6UZ (GB)