Studies on the Constituents of Sophora Species. XV. Constituents of the Root of Sophora franchetiana DUNN. (2)

A new 2-arylbenzofuran, named sophorafuran A (I), mp 145-146°C, C16H12O6, and a new coumestan, named sophoracoumestan B (II), mp over 300°C, C17H10O7, together with (-)-3-hydroxy-4-methoxy-8, 9-methylenedioxypterocarpan (III) were isolated from the root of Sophora franchetiana DUNN (Leguminosae). The structures of I and II were established to be 2-(2', 4'-dihydroxy-3'-methoxyphenyl)-5, 6-methylenedioxybenzofuran and 3-hydroxy-4-methoxy-8, 9-methylenedioxycoumestan, respectively, on the basis of chemical and spectral evidence.