(19)

(11)

EP 1 608 661 A2

(12)

(88) Date of publication A3: 02.12.2004 (43) Date of publication: 28.12.2005 Bulletin 2005/52 (21) Application number: 04722335.9 (22) Date of filing: 22.03.2004

(51) International Patent Classification (IPC)7: C07D 501/04, C07D 501/22, A61K 31/545, A61P 31/04 (86) International application number: PCT/IB2004/000850 (87) International publication number: WO 2004/083172 (30.09.2004 Gazette 2004/40)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 21.03.2003 IN DE03532003 (71) Applicant: Ranbaxy Laboratories Limited 110 019 New Dehli, Delhi (IN)	(72) Inventors: Kumar, Yatendra Gurgaon 122002,Haryana (IN) Tewari, Neera Gurgaon 122001,Haryana (IN) Singh, Shailendra Kumar Gurgaon 122001,Haryana (IN) Rai, Bishwa Prakash Azamgarh 276306,Uttar Pradesh (IN) (74) Representative: Gilholm, Stephen Philip  Ranbaxy Laboratories Limited Intellectual Property Dept. 20 Balderton Street London W1K 6TL London W1K 6TL (GB)