(19)

(11)

EP 0 593 433 A1

(12)

(43) Date of publication: 27.04.1994 Bulletin 1994/17 (21) Application number: 90913636.0 (22) Date of filing: 05.09.1990

(51) International Patent Classification (IPC):  A01N 43/ 12( . ) A01N 43/ 38( . ) A01N 43/ 42( . ) C07D 307/ 00( . ) C07D 493/ 08( . ) A01N 43/ 16( . ) A01N 43/ 40( . ) A01N 43/ 80( . ) C07D 307/ 93( . ) (86) International application number: PCT/US1990/004953 (87) International publication number: WO 1991/003464 (21.03.1991 Gazette 1991/07)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 11.09.1989 US 19890431734 (71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY Wilmington Delaware 19898 (US)	(72) Inventors: POWELL, James, Edward, Jr. Rising Sun, MD 21911 (US) RICHARDSON, Wendy, Sue NEWARK DE 19711-5978 (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)