The synthesis of 4-hydroxyfuro[2',3':7,8]coumarins and 5H benzofuro[3,2-c]furo[2,3-h]benzopyran-5-one.
D001578:Benzopyrans / Q000138:chemical synthesis*; D003374:Coumarins / Q000138:chemical synthesis*; D005419:Flavonoids; D007659:Ketones; D013057:Spectrum Analysis; D014466:Ultraviolet Rays
D001578:Benzopyrans; D003374:Coumarins; D005419:Flavonoids; D007659:Ketones