1. Department of Pharmaceutical and Medicinal Chemistry, Westfälische Wilhelms-Universität Münster, Hittorfstrasse 58-62, 48149 Münster, Germany, Molecular and Cellular Biology Unit, FUSAGx, Gembloux 5030, Belgium, Gladstone Institute of Virology and Immunology, University of California, San Francisco, California 94141-9100, Chemical Genetics Laboratory, RIKEN, Hirosawa 2-1, Wako-shi, Saitama 351-0198, Japan, and Department of Applied Chemistry, Kyushu Institute of Technology, Tabata-ku, Kitakyushu-shi 804...