1. Applied Organic Chemistry Department, Chemical Industries Research Institute , National Research Centre , Dokki , Giza 12622 , Egypt
2. Cornea Research Chair Department of Optometry College of Applied Medical Sciences , King Saud University , P. O. Box 10219 , Riyadh 11433 , Saudi Arabia
3. Department of Chemistry, College of Science , Al-Nahrain University , Baghdad 64021 , Iraq
4. School of Chemistry , Cardiff University , Main Building, Park Place , Cardiff CF10 3AT , UK