1. Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, United States
2. Structure Elucidation Group, Process and Analytical Research and Development, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, Massachusetts 02115, United States
3. Structure Elucidation Group, Process and Analytical Research and Development, Merck & Co., Inc., 126 East Lincoln Avenue, Rahway, New Jersey 07065, United States
4. Department of Biology, College of Arts and Sciences, Dakota State University, Madison, South Dakota 57042, United States
5. Suez Canal University Hospital, Suez Canal University, Ismailia 41522, Egypt
6. Department of Natural Products, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia