(19)

(11)

EP 2 262 758 A2

(12)

(88) Date of publication A3: 10.12.2009 (43) Date of publication: 22.12.2010 Bulletin 2010/51 (21) Application number: 09720254.3 (22) Date of filing: 12.03.2009

(51) International Patent Classification (IPC):  C07C 213/10(2006.01) A61K 31/135(2006.01) A61K 9/22(2006.01) C07C 213/08(2006.01) A61K 31/137(2006.01) (86) International application number: PCT/US2009/036951 (87) International publication number: WO 2009/114685 (17.09.2009 Gazette 2009/38)

(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: 12.03.2008 IN CH06122008 09.06.2008 US 59944 (71) Applicants: Dr. Reddy's Laboratories Ltd. Hyderabad 500 016 Andhra Pradesh (IN) Dr. Reddy's Laboratories, Inc. Bridgewater, NJ 08807 (US)	(72) Inventors: GADE, Srinivas, Reddy Hyderabad 500 072 Andhra Pradesh (IN) CHITTA, Vijayawrdhan Ranga Reddy District 500 078 Andhra Pr (IN) (74) Representative: Bates, Philip Ian  Reddie & Grose 16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)