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(11)

EP 2 240 496 A2

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(88) Date of publication A3: 15.10.2009 (43) Date of publication: 20.10.2010 Bulletin 2010/42 (21) Application number: 09709236.5 (22) Date of filing: 30.01.2009

(51) International Patent Classification (IPC):  C07F 3/02(2006.01) C07D 401/12(2006.01) (86) International application number: PCT/US2009/032600 (87) International publication number: WO 2009/099933 (13.08.2009 Gazette 2009/33)

(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: 01.02.2008 IN CH02852008 09.06.2008 US 59937 P (71) Applicants: Dr. Reddy's Laboratories, Ltd. Hyderabad 500 016 AP (IN) Dr. Reddy's Laboratories, Inc. Bridgewater, NJ 08807 (US)

(72) Inventors: BOLUGODDU, Vijaya Bhaskar Andhra Pradesh (IN) CHEEMALAPATI, Venkata Annapurna Sasikala Andhra Pradesh (IN) SEERAPU, Siva Prasad Reddy Andhra Pradesh (IN) ELATI, Ravi Ram Chandrasekhar Andhra Pradesh (IN) DEVARAKONDA, Surya Narayana Andhra Pradesh (IN) YERRAGUNTLA, Sesha Reddy Andhra Pradesh (IN) KEDIA, Ujjwal Kolkata 700 006 West Bengal (IN) (74) Representative: Bates, Philip Ian et al Reddie & Grose 16 Theobalds Road GB-London WC1X 8PL GB-London WC1X 8PL (GB)