Studies on the Chemical Constituents of Xanthoxylum nitidum (ROXB.)D. C. (Fagara nitida ROXB.). III. The Chemical Constituents of the Wood

The chemical constituents of the wood of Xanthoxylum nitidum (ROXB.) D. C.(Fagara nitida ROXB.) were examined. Two phenylpropanoids, methyl nitinoate (2) and dihydrocuspidiol (3), and a benzodioxane type lignan, nitidanin (4), were newly isolated. The structures of the phenylpropanoids were chemically determined. In addition, the application of a selective insensitive nuclei enhanced by polarization transfer selective (INEPT) technique in the NMR spectrum to the new lignan allowed us to deduce the structure.