Chemical composition of leaf oil from Polyalthia longifolia (Sonnerat) Thwait. grown in Côte d’Ivoire
Résumé
The chemical composition of 35 leaf oil samples from Polyalthia longifolia (Sonnerat) Thwait., growing
in five districts in Abidjan and its suburbs, has been investigated by GC(FID) in combination with
retention indices, GC–MS and 13C-NMR. In total, 30 individual components have been identified,
mostly sesquiterpenes. The contents of the main components varied substantially from sample to
sample: (E)-β-caryophyllene (18.9–31.4%), α-zingiberene (6.1–22.1%), allo-aromadendrene (12.4–
17.3%) and α-humulene (6.4–11.0%). However, PCA was unable to differentiate groups within the
35 compositions. The chemical composition of Ivorian P. longifolia leaf oils may be summarized
as follow: (E)-β-caryophyllene (M = 25.3%; SD = 1.2), allo-aromadendrene (M = 15.2%; SD = 0.5),
α-zingiberene (M = 13.6%; SD = 3.6) and α-humulene (M = 8.4%; SD = 0.2).