Components of Root Bark ofCudrania tricuspidatal.1,2Structures of Four New Isoprenylated Xanthones, Cudraxanthones A, B, C and D

Abstract
Four new isoprenylated xanthones, cudraxanthones A, B and C were isolated from the n-hexane extract of the root bark of Cudrania tricuspidata (Carr.) Bur. (Japanese name “Hariguwa”; Moraceae), and cudraxanthone D from the benzene extract. The structures of cudraxanthones A, B, C and D were shown to be 1-4, respectively, on the basis of spectral and chemical evidence.