1. Chemical Immunology Section, Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892
2. Chemical Immunology Section, Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892 and Present address: Medicinal Chemistry Division, Central Drug Research Institute, Lucknow 226001, India
3. Achillon Pharmaceuticals, New Haven, Connecticut 06510
4. Bioorganic Chemistry Section, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892
5. Southern Research Institute, Infectious Disease Research Department, Frederick, Maryland 21701 and Present Address: TherImmune Research Corporation, Gaithersburg, Maryland 20879
6. Immunobiology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Disease, National Institutes of Health, Bethesda, Maryland 20892