1. Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, Ohio 43210, United States
2. Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
3. Science and Education, Field Museum of Natural History, Chicago, Illinois 60605, United States
4. School of Pharmacy, University of Wisconsin−Madison, Madison, Wisconsin 53705, United States