1. Department of Chemistry and
Biochemistry, Calvin College, 1726 Knollcrest
Circle SE, Grand Rapids, Michigan 49546, United States
2. Department of Chemistry, Pomona College, 645 North College Avenue, Claremont,
California 91711, United States
3. Department of Medicinal Chemistry,
Research and Development, Bristol-Myers Squibb, Co., P.O. Box 5400, Princeton, New Jersey 08543-5400, United States