Coumarin and its derivatives are important chemicals in natural and synthetic organic chemistry.1 Their applications range from pharmaceuticals, food additives, cosmetics,1 optical brightening agents,2 and insecticides to plant growth regulators.3 For example, dihydrofurocoumarins show significant ability to inhibit c-AMP synthetase and polycyclic coumarins present potent anti-HIV activity in addition to other activities.4 3-Arylcoumarins show both antioxidant ...
