Jubanin-A und jubanin-B, neue cyclopeptidalkaloide aus Ziziphus jujuba

Abstract The known alkaloids mauritine-A, mucronine-D, amphibine-H, nummularine-A and -B and the previously undescribed jubanine-A and -B have been isolated from the stem bark of Ziziphus jujuba . The structures of the new compounds were elucidated by spectroscopic methods and by chemical degradation reactions.