(19)

(11)

EP 0 463 090 A1

(12)

(43) Date of publication: 02.01.1992 Bulletin 1992/01 (21) Application number: 90905757.0 (22) Date of filing: 14.02.1990

(51) International Patent Classification (IPC):  A01N 47/ 38( . ) C07D 491/ 04( . ) C07D 231/ 54( . ) C07D 491/ 052( . ) (86) International application number: PCT/US1990/000746 (87) International publication number: WO 1990/010623 (20.09.1990 Gazette 1990/22)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 09.03.1989 US 19890321075 14.09.1989 US 19890407065 (71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY Wilmington Delaware 19898 (US)	(72) Inventors: HARRISON, Charles, Richard Newark, DE 19702 (US) LAHM, George, Philip Wilmington, DE 19808 (US) SHAPIRO, Rafael Wilmington, DE 19803 (US) (74) Representative: Hildyard, Edward Martin, et al  Frank B. Dehn & Co. European Patent Attorneys Imperial House 15-19 Kingsway London WC2B 6UZ London WC2B 6UZ (GB)