vi Foreward procedures are also described in some detail.But before any clinical tests can be earried out,the compound must be isolated.Even if there is never enough for clinical testing,the isolation and determination of structure must take priority ecome an internatic procedures are also described in some detail. But before any clinical tests can be carried out, the compound must be isolated. Even if there is never enough for clinical testing, the isolation and determination of structure must take priority. All these aspects of marine natural products chemistry are treated with authority in this book. It is certain to become an internationally accepted and widely read volume on an important subject. D.H.R. BARTON (deceased) College Station Texas A&M University TX, USA vi Foreward