1. Department of Chemistry; University of Sargodha; Sargodha 40100 Pakistan
2. Department of Pharmaceutical Chemistry; College of Pharmacy, Salman bin Abdulaziz University; PO Box 173 Al-Kharj 11942 Saudi Arabia
3. University College of Agriculture; University of Sargodha; Sargodha 40100 Pakistan
4. Natural Products Research Unit, Department of Biological and Biomedical Sciences; Aga Khan University Medical College; Karachi 74800 Pakistan
5. Department of Pharmacy, College of Health Sciences; Mekelle University; PO Box 1871 Mekelle Ethiopia