1. Department of Radiology, Biomedical Research Imaging Center, and Lineberger Comprehensive Cancer Center, the University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, 27599, USA
2. Department of Chemistry, the University of Delaware, Newark, Delaware, 19716, USA
3. Department of Molecular Imaging and Therapy, Beckman Research Institute, City of Hope, Duarte, California, 91010, USA
4. Division of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA