Institution: | 1. Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202 (USA);2. Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS, Avenue de la Terrasse, 91198 Gif‐sur‐Yvette (France), Fax: (+33)?1‐6907‐7752 |