1. Department
of Neurology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, New York 10065, United States
2. Molecular
Pharmacology and Chemistry Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, United States
3. Department
of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States