1. National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, Mississippi, USA.
2. Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt.
3. ElSohly Laboratories, Inc., Oxford, Mississippi, USA.
4. Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt.
5. Department of Pharmaceutical and Drug Delivery, School of Pharmacy, The University of Mississippi, University, Mississippi, USA.
6. Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, Egypt.