most relevant natural substances, including 15,000 cross references and 2,200 formulas. The book contains descriptions of the different substance classes and important analytical methods, comprehensive indices of Latin Species names and molecular formulas as well as a vast amount of cross referencing. It has been compiled by 40 authors, all of whom are leaders in their respective fields. Written in a clear, consistent style and thoroughly copy edited, this is a must-have reference work for chemists, biochemists working with natural products, researchers in plant protection, pharmacists and medical researchers, biologists working in drug research as well as microbiologists and botanists working on microorganisms, plants or marine organisms, and interested layman.