Structures of Four New Isoprenylated Xanthones, Cudraxanthones L, M, N, and O fromCudrania tricuspidata¹,²

Four new isoprenylated xanthones, cudraxanthones L, M, N, and O were isolated from the ethanol extract of the root bark of CUDRANIA TRICUSPIDATA (Carr.) Bur. (Moraceae), collected in China. The structures of cudraxanthones L, M, N, and O were shown to be 1-4, respectively, on the basis of chemical and spectral evidences.