1. Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
2. Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
3. Radiochemistry and Molecular Imaging Probes Core, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
4. Department of Pharmacology, Weill Cornell Medical College, New York, New York 10065, United States
5. Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
6. Department of Radiology, Weill Cornell Medical College, New York, New York 10065, United States