Chemical Constituents from Leaves of Phellodendron amurense Rupr.

Seven compounds were isolated from the 95% ethanol extract of the leaves of Phellodendron amurense Rupr..Their structures were identified as phellodenol-A(1),skimmin(2),phellodenol E(3),amurensin(4),phellamurin(5),(2R)-phellodensin-F(6),and clerosterol 3-O-β-D-galactopyranoside(7) on the basis of NMR data and comparing with literatures.Compound 7 was isolated from this genus for the first time,and 3 and 6 were isolated from the plant for the first time.