Natural product chemistry is an important and dynamic field of chemistry since it deals with the chemical processes associated with living organisms. The investigation of the chemistry of terrestrial and marine organisms has led to a host of novel bioactive compounds many of which now find use in medicine. Such materials offer exciting challenges to synthetic organic chemists and a variety of brilliant approaches and strategies have been developed by leading exponents of the art. This volume contains articles pertaining both to structural studies on novel natural products as well as on elegant synthetic strategies developed to such substances. The contributions made by some of the world's leading scientists in the field of presenting state-of-the-art lectures should prove to be of wide interest to the readers. Advances in Natural Product Chemistry is the proceedings of the Fifth International Symposium and Pakistan-US Binational Workshop which is held bi-annually at the H.E.J. Research Institute of Chemistry, Karachi, Pakistan, and organized by Professor Atta-ur-Rahman