A novel flavonoid from the root of Macrothelypteris torresiana (Gaud.) Ching

Abstract A novel flavonoid was isolated from the root of Macrothelypteris torresiana (Gaud.) Ching. The structure of the product was identified as 5, 7-dihydroxy-2-(1, 2-isopropyldioxy-4-oxocyclohex-5-enyl)-chromen-4-one on the ground of chemical and spectroscopic methods.