1. H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 7527, Pakistan
2. Section of Organic Chemistry & Biochemistry, Department of Chemistry, University of Ioannina, Ioannina, GR-45110, Greece
3. Dr Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 7527, Pakistan
4. Department of Biochemistry, Faculty of Science, King Abdul-Aziz University, Jeddah-21589, Saudi Arabia