Chemical Composition of Leaves and Stem oil of Zanthoxylum rubescens Growing in Cote d'Ivoire

The leaves and stem of Zanthoxylum rubescens Planck ex Hook. f. growing in Cote d'Ivoire, were submitted to hydrodistillation using a Clevenger type apparatus. Three different localities have been chosen for our investigations, namely Petit Yapo, Anguededou and Grand-Lahou. The oil obtained was investigated by GC(RI), GC-MS and C-13 NMR. Twenty-nine compounds were identified accounting for 81.8-95.2 % in the oil. The leaves oil composition was dominated by (E)-beta-caryophyllene (39.3-60.3 %), (E)-nerolidol (32.2 %) accompanied with significant contents of thymol, alpha-humulene and beta-sesquiphellandrene. While (E)-nerolidol (39.4 %) added to caryophyllene oxide (6.9 %) and thymol (6.7 %) were the major components of stem oil.