1. Designer Drug Research Unit, National Institute on Drug Abuse Intramural Research Program, Baltimore, Maryland 21224, United States
2. Laboratory of Toxicology, Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Campus Heymans, Ottergemsesteenweg 460, 9000 Ghent, Belgium
3. Usona Institute, Madison, Wisconsin 53711, United States
4. Department of Chemistry & Biochemistry, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, United States
5. Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, United States
6. CaaMTech, Inc., Issaquah, Washington 98027, United States