Linguistics

Philosophy

Chromatography

Essential oil

Organic chemistry

Germacrene D

Analytical Chemistry (journal)

Germacrene

Chemistry

Composition (language)

Chemical composition

Humulene

Chemistry & Biodiversity

The chemical composition of 45 essential oil samples isolated from the leaves of Polyalthia oliveri harvested in three Ivoirian forests was investigated by GC ‐ FID (retention indices measured on two columns of different polarities), and by 13 C‐ NMR , following a method developed in our laboratory. In total, 41 components were identified. The content of the main components varied drastically from sample to sample: ( E )‐ β ‐caryophyllene (1.2 – 50.8%), α ‐humulene (0.6 – 47.7%), isoguaiene (0 – 27.9%), alloaromadendrene (0 – 24.7%), germacrene B (0 – 18.3%), δ ‐cadinene (0.4 – 19.3%), and β ‐selinene (0.2 – 18.5%). The analysis of six oil samples selected in function of their chromatographic profiles is reported in detail. The 45 oil compositions were submitted to hierarchical cluster and principal components analysis, which allowed the distinction of three groups within the oil samples. The compositions of the oils from group I (15 samples) and II (12 samples) were dominated by ( E )‐ β ‐caryophyllene and α ‐humulene, respectively. Oil samples of group III (18 samples) needed to be partitioned into four subgroups III .1– III .4 whose compositions were dominated by alloaromadenrene, isoguaiene, germacrene B, and δ ‐cadinene, respectively.

Composition and Chemical Variability of Ivoirian <i>Polyalthia oliveri</i> Leaf Oil

Composition and Chemical Variability of Ivoirian Polyalthia oliveri Leaf Oil