1. Department of Chemistry, Brooklyn College, Brooklyn, New York 11210, United States
2. Ph.D. Program in Biochemistry, The Graduate Center of the City University of New York, New York, New York 10016, United States
3. Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
4. Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, New York 10016, United States