Composition and Chemical Variability of Trunk Bark Oil of Pachylobus klaineanus (Pierre) Guillaumin. From Côte D'Ivoire.

The chemical composition of 50 individual trunk bark oil samples from plants of Pachylobus klaineanus (Pierre) Guillaumin. collected in eight Ivoirian localities was investigated by GC-FID (50 samples), GC/MS (30 samples), and 13C-NMR (23 samples). Eighty-three compounds were identified. Oil samples are dominated by monoterpenes. The main components were α-pinene (28.8%-76.2%), β-pinene (2.0%-46.3%), limonene (0.9%-13.8%), p-cymene (0%-19.2%), and myrcene (0%-17.9%). The 50 oil compositions were submitted to hierarchical clustering and principal components analyses, which allowed the distinction of two groups within the oil samples. Group II could be divided into two subgroups, IIa and IIb. Group I (23 samples) was characterized by the pre-eminence of α-pinene; subgroup IIa (19 samples) was dominated by α-pinene followed by β-pinene, while IIB (8 samples) is represented by α-pinene and β-pinene in association with monoterpene hydrocarbons (limonene and p-cymene). The trunk bark essential oil of this species was reported for the first time.