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EP 2 046 342 A2

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(88) Date of publication A3: 20.11.2008 (43) Date of publication: 15.04.2009 Bulletin 2009/16 (21) Application number: 07813544.9 (22) Date of filing: 30.07.2007

(51) International Patent Classification (IPC):  A61K 31/66(2006.01) C07F 9/38(2006.01) C07F 9/22(2006.01) (86) International application number: PCT/US2007/074738 (87) International publication number: WO 2008/014510 (31.01.2008 Gazette 2008/05)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 28.07.2006 US 820638 P (71) Applicants: Dr. Reddy's Laboratories Ltd. Hyderabad 500 016 Andhra Pradesh (IN) Dr. Reddy's Laboratories, Inc. Bridgewater, NJ 08807 (US)

(72) Inventors: BOLUGODDU, Vijayabhaskar Hyderabad 500 072, Andhra Pradesh (IN) DAHYABHAI, Jaydeepkumar Lilakar Lilapor 396 001, Gujarat (IN) KAMMILI, Rambabu Venkata Krishna District, Andhra Pradesh (IN) MORE, Yogesh Prakash Pune 411 033, Maharashtra (IN) THAKUR, Pallavi Warangal 506 011, Andhra Pradesh (IN) (74) Representative: Müller-Boré & Partner Patentanwälte  Grafinger Strasse 2 81671 München 81671 München (DE)