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MSN LABORATORIES LIMITED; SATYANARAYANA REDDY, Manne; THIRUMALAI RAJAN, Srinivasan; ESWARAIAH, Sajja; RAMA SUBBA REDDY, Karamala; KONDAL REDDY, Bairy; VENKAT REDDY, Ghojala Patent: WO2011/42918 A2, 2011 ;