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(11)

EP 2 470 542 A2

(12)

(88) Date of publication A3: 21.07.2011 (43) Date of publication: 04.07.2012 Bulletin 2012/27 (21) Application number: 10812650.9 (22) Date of filing: 27.08.2010

(51) International Patent Classification (IPC):  C07D 487/04(2006.01) A61P 3/10(2006.01) A61K 31/4985(2006.01) (86) International application number: PCT/US2010/046938 (87) International publication number: WO 2011/025932 (03.03.2011 Gazette 2011/09)

(84) Designated Contracting States: AL 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 SM TR (30) Priority: 28.08.2009 IN CH20902009 05.03.2010 US 310900 P (71) Applicants: Dr. Reddy's Laboratories Ltd. Hyderabad 500 016 (IN) Dr. Reddy's Laboratories Inc. Bridgewater, NJ 08807 (US)

(72) Inventors: BANDICHHOR, Rakeshwar Dist. Sultanpur Uttar Pradesh (IN) GUDIMALLA, Nagaraju Andhra Pradesh (IN) DWIVEDI, Namrata Lucknow 226 016 Uttar Pradesh (IN) CHETLURU, Kiran Kumar Andhra Pradesh (IN) GADE, Srinivas Reddy Andhra Pradesh (IN) MUVVA, Venkateswarlu Andhra Pradesh (IN) SRIVASTAVA, Bindu Delhi 110 034 (IN) (74) Representative: Bates, Philip Ian  Reddie & Grose 16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)