1. Department of Medicinal Chemistry, School of Pharmacy, P.O. Box 1848, University of Mississippi, University, Mississippi 38677-1848, Department of Chemistry and Biochemistry, P.O. Box 1848, University of Mississippi, University, Mississippi 38677-1848, Department of Medicine, San Francisco General Hospital, University of California, San Francisco, Box 0811, San Francisco, California 94143, and National Center for Natural Products Research, School of Pharmacy, P.O. Box 1848, University of Mississippi,...