1. Department of Chemistry, Federal Urdu University of Art, Science and Technology, Karachi, Pakistan
2. H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
3. Department of Chemistry, University of Karachi, Karachi-75270, Pakistan
4. H . E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan
5. Department of Microbiology, Federal Urdu University of Art, Science and Technology, Karachi, Pakistan