ABSTRACT
References ............................................................................................................. 420
Flavonoids constitute one of the largest and recently very popular group of phytochemicals. They are virtually ubiquitous in green plants and as such are likely to be
encountered in any work involving plant extracts. The term flavonoid is a collective term for plant pigments, mostly derived from benzo-g-pyrone, which is synonymous with chromone.1 In plants, flavonoid aglycones (flavonoids without attached sugars) occur in a variety of structures, all containing 15 carbon atoms arranged in a C6-C3C6 configuration (flavonoid nucleus is depicted in Figure 16.1).
