As a source of medicines, plants have formed the basis for sophisticated traditional systems and continue providing mankind with new remedies. About twenty five percentage of all medical prescriptions are based on substances derived from plants or plant-derived synthetic analogues. To avoid hazards associated with the wrong use of medicinal herbs, isolation and structure-elucidation, as well as the physiological activity assessment represent the scientific basis to safe medicaments. This book contains some methods of extraction, fractionation, separation and purification of natural products...