(19)

(11)

EP 1 278 755 A2

(12)

(88) Date of publication A3: 07.03.2002 (43) Date of publication: 29.01.2003 Bulletin 2003/05 (21) Application number: 01906061.5 (22) Date of filing: 01.03.2001

(51) International Patent Classification (IPC)7: C07D 521/00, C07D 249/12, A61K 31/41 (86) International application number: PCT/IB0100/300 (87) International publication number: WO 0106/6551 (13.09.2001 Gazette 2001/37)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 07.03.2000 IN DE019800 22.05.2000 US 575578 (71) Applicant: Ranbaxy Laboratories, Limited New Delhi 110 019,Maharashtra (IN)	(72) Inventors: VERMA, Ashwani Kumar New Delhi 110 018Maharashtra (IN) ARORA, Sudershan K. Gurgaon 122 001 (IN) ARORA, Jasbir Singh New Delhi 110 016Maharashtra (IN) RATTAN, Ashok New Delhi 110 044Maharashtra (IN) (74) Representative: Cronin, Brian Harold John  Cronin Intellectual PropertyRoute de Clémenty 62 1260 Nyon 1260 Nyon (CH)