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(11)

EP 2 291 366 A2

(12)

(88) Date of publication A3: 25.02.2010 (43) Date of publication: 09.03.2011 Bulletin 2011/10 (21) Application number: 09763190.7 (22) Date of filing: 20.05.2009

(51) International Patent Classification (IPC):  C07D 403/10(2006.01) C07D 403/02(2006.01) C07D 403/08(2006.01) (86) International application number: PCT/US2009/044587 (87) International publication number: WO 2009/151899 (17.12.2009 Gazette 2009/51)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 26.05.2008 IN CH12852008 18.09.2008 US 98003 P (71) Applicants: Dr. Reddy's Laboratories, Ltd. Hyderabad 500 016 AP (IN) Dr. Reddy's Laboratories Inc. Bridgewater, NJ 08807 (US)	(72) Inventors: KADABOINA, Rajasekhar Andhra Pradesh (IN) NARIYAM, Munaswamy, Sekhar Hyderabad 500 072 Andhra Pradesh (IN) PATEL, Vijay, Bhailalbhai Hyderabad 500 072 Andhra Pradesh (IN) (74) Representative: Bates, Philip Ian et al Reddie & Grose 16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)