Pericarp of Zanthoxylum coreanum Nakai have been used as a crude medicine for the treatment of ozena, rheumatoid, nasal sinusitis, meno-xenia, dyspepsia, toothache, sore throat, pains in the limbs, etc. in Korea. A sterol fraction and two compounds, compound I and II were isolated from the roots, stems, leaves of Zanthoxylum coreanum Nakai. The sterol fraction was identified as a mixture of β-sitosterol and campesterol. Compound I, colorless prismatic crystals, C_(14)H_(13)NO₄, mp. 175∼177°, was proved to be skimmianine which is one of the alkaloids and compound II, C_(14)H_(28)O₂, mp. 53∼55°, white powdered crystals was identified as myristic acid.