(19)

(11)

EP 0 394 224 A1

(12)

(43) Date of publication: 31.10.1990 Bulletin 1990/44 (21) Application number: 88900190.0 (22) Date of filing: 04.12.1987

(51) International Patent Classification (IPC):  A01N 47/ 36( . ) C07D 491/ 052( . ) C07D 491/ 048( . ) C07D 521/ 00( . ) (86) International application number: PCT/US1987/003110 (87) International publication number: WO 1989/005296 (15.06.1989 Gazette 1989/13)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY Wilmington Delaware 19898 (US)	(72) Inventor: GEE, Stephen, Kenneth Wilmington, DE 19809 (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)