(19)

(11)

EP 1 178 974 A1

(12)

(43) Date of publication: 13.02.2002 Bulletin 2002/07 (21) Application number: 00925731.2 (22) Date of filing: 28.04.2000

(51) International Patent Classification (IPC)7: C07D 251/60 (86) International application number: PCT/NL0000/277 (87) International publication number: WO 0071/525 (30.11.2000 Gazette 2000/48)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 20.05.1999 EP 99201597 (71) Applicant: DSM N.V. 6411 TE Heerlen (NL)	(72) Inventor: TJIOE, Tjay, Tjien NL-6136 BR Sittard (NL)