The hexanic and methanolic extracts of roots and stem of Zanthoxylum stelligerum (Rutaceae), after chromatographic and phytochemical procedures, yelded the triterpene lupeol, the furanocumarin imperatorin and the benzophenathridine alkaloids dihidrocheleritrine and its probable product of oxidation. The structural determinations of these compounds were performed on basis of spectroscopic analysis as well as comparison with authentic samples.