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(11)

EP 2 197 446 A2

(12)

(88) Date of publication A3: 23.04.2009 (43) Date of publication: 23.06.2010 Bulletin 2010/25 (21) Application number: 08829913.6 (22) Date of filing: 22.08.2008

(51) International Patent Classification (IPC):  A61K 31/496(2006.01) C07D 417/14(2006.01) A61K 31/519(2006.01) C07D 209/34(2006.01) (86) International application number: PCT/US2008/073981 (87) International publication number: WO 2009/032558 (12.03.2009 Gazette 2009/11)

(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 MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 31.08.2007 IN CH19552007 05.06.2008 US 58984 (71) Applicants: Dr. Reddy's Laboratories Ltd. Hyderabad 500 016 Andhra Pradesh (IN) Dr. Reddy's Laboratories, Inc. Bridgewater, NJ 08807 (US)

(72) Inventors: MANDAVA, Brahmeswara Rao Venkata Naga Hyderabad 500 072 Andhra Pradesh (IN) DEVARAKONDA, Surya Narayana Hyderabad 500 072 Andhra Pradesh (IN) PEDDIREDDY, Subba Reddy Hyderabad 500 072 Andhra Pradesh (IN) SINGAMSETTY, Radha Krishna Hyderabad 500 072 Andhra Pradesh (IN) MANNE, Naga Raju Hyderabad 500 072 Andhra Pradesh (IN) (74) Representative: Bates, Philip Ian  Reddie & Grose 16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)