List of contributors. Preface. New anti-HIV agents in preclinical or clinical development (E. De Clercq). Inhibitors of human immunodeficiency virus integration (D.J. Hazuda, S.D. Young). Non-peptidic protease inhibitors (NPPIs): Tipranavir (D. Mayers et al.). Design of neuraminidase inhibitors as anti-influenza virus agents (H. Jin, C.U. Kim). Six-membered carbocyclic nucleosides (J. Wang, M. Froeyen, P. Herdewijn). cycloSal-pronucleotides - Design of the concept, chemistry and antiviral activity (C. Meier). Index.