1. Natural Products Laboratory, Natural and Medical Sciences Research Center, University of Nizwa, P.O. Box 33, PC 616, Birkat Al Mauz, Nizwa, Sultanate of Oman
2. Central Instrument Laboratory, College of Agriculture and Marine Sciences, Sultan Qaboos University, Muscat, Oman
3. Department of Chemistry, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan
4. H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan