1. Department of Chemistry, Chemistry
Building, Room 426, 578 S. Shaw Lane, Michigan State University, East Lansing, Michigan 48824,
United States
2. Department
of Chemistry and
Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina
29208, United States
3. Chemical
Biology Laboratory, Center
for Cancer Research, National Cancer Institute-Frederick, 376 Boyles Street, Building 376, Room 208, Frederick, Maryland
21702,
United States