1. Chemistry of Natural and Microbial Products Department, Pharmaceutical and Drug Industries Research Division, National Research Center 33 El Bohouth Street (former El Tahrir St.) Dokki, Giza P.O. Box 12622 Egypt
2. Department of Basic ScienceUniversity College in Adam, Umm Al‐Qura University Makkah Almukkarramah Saudi Arabia
3. Department of Chemistry, Faculty of ScienceCairo University Giza 1263 Egypt
4. Department of ChemistryFaculty of Applied Science, Umm Al‐Qura University Makkah Almukkarramah 21514 Saudi Arabia