(19)

(11)

EP 0 589 947 A1

(12)

(43) Date of publication: 06.04.1994 Bulletin 1994/14 (21) Application number: 92911736.0 (22) Date of filing: 10.06.1992

(51) International Patent Classification (IPC):  A01N 43/ 54( . ) C07D 239/ 38( . ) C07D 239/ 52( . ) C07D 239/ 60( . ) C07D 405/ 12( . ) C07D 239/ 34( . ) C07D 239/ 46( . ) C07D 239/ 56( . ) C07D 401/ 12( . ) C07D 409/ 12( . ) (86) International application number: PCT/EP1992/001333 (87) International publication number: WO 1992/022538 (23.12.1992 Gazette 1992/32)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 11.06.1991 GB 19910012566 (71) Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. NL-2596 HR Den Haag (NL)	(72) Inventors: ASTLES, David, Phillip Kent ME8 0AX (GB) MCARTHUR, Alasdair Kent ME10 1QP (GB) NEWTON, Trevor, William D-6501 Schwabenheim (DE) (74) Representative: Allam, Peter Clerk, et al  LLOYD WISE, TREGEAR & CO. Norman House 105-109 Strand London WC2R 0AE London WC2R 0AE (GB)