(19)

(11)

EP 0 977 752 A1

(12)

(43) Date of publication: 09.02.2000 Bulletin 2000/06 (21) Application number: 98915643.5 (22) Date of filing: 21.04.1998

(51) International Patent Classification (IPC)7: C07D 409/06, A01N 43/56 (86) International application number: PCT/US9807/978 (87) International publication number: WO 9849/159 (05.11.1998 Gazette 1998/44)

(84) Designated Contracting States: DE FR IT (30) Priority: 25.04.1997 US 44875 P 16.07.1997 US 52682 P (71) Applicant: E.I. DUPONT DE NEMOURS AND COMPANY Wilmington,Delaware 19898 (US)	(72) Inventor: TSENG, Chi-Ping Wilmington, DE 19803 (US) (74) Representative: Beacham, Annabel Rose et al Frank B. Dehn & Co.,European Patent Attorneys,179 Queen Victoria Street London EC4V 4EL London EC4V 4EL (GB)