MATRIX LABORATORIES LIMITED; VELLANKI, Siva Rama Prasad; SAHU, Arabinda; KATUKURI, Aravind Kumar; VANAMA, Vikram; KOTHARI, Satishbabu; PONNEKANTI, Venkata Suryanarayana; DATTA, Debashish Patent: WO2011/48604 A2, 2011 ; Location in patent: Page/Page column 17-18 ;