(19)

(11)

EP 0 506 709 A1

(12)

(43) Date of publication: 07.10.1992 Bulletin 1992/41 (21) Application number: 91900580.0 (22) Date of filing: 20.11.1990

(51) International Patent Classification (IPC):  A01N 47/ 38( . ) C07D 471/ 04( . ) C07D 495/ 14( . ) C07F 9/ 6561( . ) A01N 57/ 32( . ) C07D 471/ 14( . ) C07D 513/ 04( . ) (86) International application number: PCT/US1990/006653 (87) International publication number: WO 1991/008207 (13.06.1991 Gazette 1991/13)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 27.11.1989 US 19890441722 01.12.1989 US 19890444510 16.05.1990 US 19900524229 (71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY Wilmington Delaware 19898 (US)	(72) Inventor: 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)