1. a Department of Pharmaceutical Chemistry , Gokaraju Rangaraju College of Pharmacy , Hyderabad , Andhra Pradesh , India
2. b Centre for Pharmaceutical Sciences , JNT University , Hyderabad , Andhra Pradesh , India
3. c Faculty of Pharmacy , Osmania University , Hyderabad , Andhra Pradesh , India
4. d Natco Pharma Ltd., Natco Research Center , Hyderabad , Andhra Pradesh , India