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Composition and Chemical Variability of Cleistopholis patens Trunk Bark Oil from Côte d'Ivoire
Author(s) -
Ouattara Zana A.,
Boti Jean Brice,
Ahibo Coffy Antoine,
Bekro YvesAlain,
Janat Mamyrbekova,
Casanova Joseph,
Tomi Félix,
Bighelli Ange
Publication year - 2017
Publication title -
chemistry and biodiversity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.427
H-Index - 70
eISSN - 1612-1880
pISSN - 1612-1872
DOI - 10.1002/cbdv.201600313
Subject(s) - chemistry , chemical composition , bark (sound) , germacrene , sabinene , sesquiterpene , composition (language) , botany , essential oil , horticulture , limonene , food science , stereochemistry , organic chemistry , biology , ecology , linguistics , philosophy
The chemical composition of trunk bark oil from Cleistopholis patens ( Benth .) Engl . & Diels , growing wild in Côte d'Ivoire, has been investigated by GC ( FID ) in combination with retention indices, GC / MS and 13 C‐ NMR . Moreover, one oil sample has been subjected to CC and all the fractions analyzed by GC ( RI ) and 13 C‐ NMR . In total, 61 components have been identified, including various sesquiterpene esters scarcely found in essential oils. 13 C‐ NMR was particularly efficient for the identification of a component not eluted on GC and for the quantification of heat‐sensitive compounds. Then, 36 oil samples, isolated from trunk bark harvested in six Ivoirian forests have been analyzed. The content of the main components varied drastically from sample to sample: ( E )‐ β ‐caryophyllene (0.4 – 69.1%), β ‐pinene (0 – 57%), α ‐phellandrene (0 – 33.2%), α ‐pinene (0.1 – 30.6%), β ‐elemol (0.1 – 29.9%), germacrene D (0 – 25.4%), juvenile hormone III (0 – 22.9%), germacrene B (0 – 20.6%) and sabinene (tr‐20.3%). Statistical analysis, hierarchical clustering and principal components analysis, carried out on the 36 compositions evidenced a fair chemical variability of the stem bark oil of this species. Indeed, three clusters have been distinguished: the composition of group I (ten samples) was dominated by β ‐pinene and α ‐pinene, group II (nine samples) was represented by α ‐phellandrene and p ‐cymene and group III (16 samples) by β ‐elemol. A sample displayed an atypical composition dominated by ( E )‐ β ‐caryophyllene.