Components of the root bark of Morus cathayana. 1. Structures of five new isoprenylated flavonoids, sanggenols A - E and a diprenyl-2-arylbenzofuran, mulberrofuran V - Fukai,T.; Pei,Y.-H.; Nomura,T.; Xu,C.-Q.; Wu,L.-J.; Chen,Y.-J. (Heterocycles, 1996)