1. Department of Chemistry, The University of Winnipeg, 99 Portage Avenue, Winnipeg, Manitoba R3B 2G3,
Canada
2. Department of Biology, Richardson College for the Environmental and Science Complex, The University of
Winnipeg, 599 Portage Avenue, Winnipeg, Manitoba R3B 2G3, Canada
3. H.E.J. Research Institute of Chemistry,
International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan