Natural products, i.e., products from Nature, be it of plant or animal origin, plays a major role in human life. Hence the isolation and characterization of natural products will help in understanding their mode of action with reference to their biological and pharmacological activity. The book has been written with a view that it would help both students and researchers who are in their nitial stages of exploration in the field of Natural product chemistry. With the oluminous information available on each such topic, only the basic aspect, hopefully to elicit interest in further exploration has been discussed.