Heterocyclic chemistry is the largest of the classical divisions of organic chemistry. Heterocyclic compounds are widely distributed in nature, playing a vital role in the metabolism of living cells. Their practical applications range from extensive clinical use to fields as diverse as agriculture, photography, biocide formulation and polymer science. The range of known compounds is enormous, encompassing the whole spectrum of physical, chemical and biological properties. The Handbook of Heterocyclic Chemistry is illustrated throughout with thousands of clearly drawn chemical structures and contains over 1500 chemical figures and reactions. The highly systematic coverage given to the subject makes this one of the most authoritative single-volume account of modern heterocyclic chemistry available.