1. H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
2. Indus Pharma (Pvt.) Ltd., Korangi Industrial Area, Karachi-74900, Pakistan
3. Department of Pharmacy and Pharmacotherapeutic, Faculty of Medicine and Biomedical Sciences, University of Yaounde 1, PO Box 8664, Yaounde, Cameroon
4. Department of Chemistry, COMSATS Institute of Information Technology, Abbottabad, Pakistan