1. School of Pharmacy, Rueckert-Hartman College, Regis University, 3333 Regis Blvd, Denver, CO 80221 USA
2. Skaggs School of Pharmacy & Pharmaceutical Sciences, University of Colorado, 12850 E. Montview Blvd, Aurora, CO 80045 USA
3. Department of Chemistry & Biochemistry, University of Colorado, Boulder, CO 80309-0215, USA