Components of Root Bark of Cudrania tricuspidata 2. Structures of Two New Isoprenylated Flavones, Cudraflavones A and B.
Two new isoprenylated flavones, cudraflavones A and B were isolated from the root bark of CUDRANIA TRICUSPIDATA (Carr.) Bur. (Japanese name "Hariguwa", Moraceae). The structures of cudraflavones A and B were shown to be 1 and 2, respectively, on the basis of spectral data. Photo-oxidative cyclization occurred with cudraflavone B leading to the formation of a hydroperoxide possessing a dihydrooxepin ring.
Fujimoto
T
T
Faculty of Pharmaceutical Sciences, Toho University, 2-2-1, Miyama, Funabashi, Chiba 274, Japan.
Hano
Y
Y
Nomura
T
T
Uzawa
J
J