Coumarin and its derivatives represent one of the most active classes of
compounds possessing a wide spectrum of biological activity[1-9] Many of
these compounds have proved to be active as antitumor[1-2], antibacterial[3,4],
antifungal[5-7],anticoagulant[8] and antiinflammatory[9]. In addition, these
compounds are used as additives to food and cosmetics[10],