Written by a group of experts affiliated with the prestigious Dictionary of Natural Products, this book provides a concise overview of the key structural types of natural products and their interrelationship. A structurally diverse group, ranging from simple aliphatic carbon chains to high molecular weight proteins, natural products can usually be classified into one or more groups. The text describes these major types, including flavonoids, carbohydrates, terpenoids, polyketides, and lipids, and it illustrates them with accurate chemical structures, demonstrating the biosynthetic relationships between groups. The book also covers nomenclature, stereochemistry, and ring numbering.