ON THE CONSTITUENTS OF THE MORACEAE PLANTS .7. COMPONENTS OF THE ROOT BARK OF CUDRANIA-TRICUSPIDATA .6. STRUCTURES OF 4 NEW ISOPRENYLATED XANTHONES, CUDRAXANTHONE-L, CUDRAXANTHONE-M, CUDRAXANTHONE-N, AND CUDRAXANTHONE-O FROM CUDRANIA-TRICUSPIDATA

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.