Division of Environmental Health Sciences, Wadsworth Center, New York State Department of Health, Albany, New York 12201, Bristol-Myers Squibb, P.O. Box 4000, Princeton, New Jersey 08543, INSERM U620, ...

Department of Chemistry, 560 Oval Drive, Purdue University, West Lafayette, Indiana 47907 * To whom correspondence should be addressed. R. G. Cooks, Department of Chemistry, Purdue University, West ...