A New Diarylheptanoid from the Bark of Myrica rubra

Abstract A new diarylheptanoid, 3,5-dimethoxyl-17-hydroxyl-4,11,19-triketo-[7,0]meta-cyclophane, named as rubanone 1 , was isolated from the bark of Myrica rubra along with four known compounds 2 – 5 . Their structures were elucidated by various spectroscopic methods including 2D-NMR techniques or comparison with authentic samples.