Plants are a tremendous source for the discovery of new products of medicinal
values for drug development. Several distinct chemicals derived from plants are
important drugs currently used in different parts of the world. Many of the
drugs sold today are simple synthetic modifications or copies of the naturally
obtained substances. The persents volume presents the role of plant compounds in
the etiology of human diseases. Antimicrobial, antiviral, antioxidative,
anti-inflammaoty, immunomodulatory and antitumour properties have been
attributed to many compounds isolated from plants. Current interest in
flavonoids have shown to possess a variety of biological and pharmacological
activities in organisms. The results reported from Loranthus micranthis, Mucuna
pruriens, Tithonia