Chemical Variability of Ivoirian Xylopia rubescens Leaf Oil

• Published in: Chemistry & biodiversity 2017-02, Vol.14 (2), p.np-n/a
• Main Authors: Yapi, Thierry Acafou, Boti, Jean Brice, Tonzibo, Zanahi Félix, Ahibo, Coffy Antoine, Bighelli, Ange, Casanova, Joseph, Tomi, Félix
• Format: Article
• Language: English
• Subjects: (8Z,11Z,14Z)‐Heptadeca‐8,11,14‐trien‐2‐one; Biodiversity and Ecology; Chemical Sciences; Chemical variability; Cote d'Ivoire; Environmental Sciences; Furanoguaia‐1,4‐diene; Gas Chromatography-Mass Spectrometry; Leaf essential oil; Magnetic Resonance Spectroscopy; Oils, Volatile - chemistry; Plant Leaves - chemistry; Plant Oils - chemistry; Principal Component Analysis; Xylopia - chemistry; Xylopia rubescens
• ISSN: 1612-1872; 1612-1880
• DOI: 10.1002/cbdv.201600200

Forty‐two essential oil samples were isolated from leaves of Xylopia rubescens harvested in three forests of Southern Ivory Coast. All the samples have been submitted to GC‐FID and the retention indices (RIs) of individual components have been measured on two capillary columns of different polarity. In addition, 20 oil samples, selected on the basis of their chromatographic profile, were also analyzed by 13C‐NMR and 24 components (78.0 – 92.4% of the whole compositions) have been identified. The content of the main components varied drastically from sample to sample: furanoguaia‐1,4‐diene (5.7 – 54.1%), furanoguaia‐1,3‐diene (1.1 – 10.5%), (8Z,11Z,14Z)‐heptadeca‐8,11,14‐trien‐2‐one (4.3 – 16.0%), and (E)‐β‐caryophyllene (1.7 – 17.3%). Hierarchical cluster and principal components analysis of the 42 oil compositions allowed the distinction of two well‐differentiated groups of unequal importance within the oil samples. Oil samples of the main group (Group II) contained mainly furanoguaia‐1,4‐diene (mean [M] = 43.1%; standard deviation [SD] = 3.2%) while furanoguaia‐1,3‐diene (M = 8.4%; SD = 0.9%) and (8Z,11Z,14Z)‐heptadeca‐8,11,14‐trien‐2‐one (M = 7.1%; SD = 1.5%) were present at appreciable contents. The composition of Group I was dominated by furanoguaia‐1,4‐diene (M = 17.0%; SD = 8.5%), (8Z,11Z,14Z)‐heptadeca‐8,11,14‐trien‐2‐one (M = 10.2%; SD = 2.4%) and (E)‐β‐caryophyllene (M = 9.5%; SD = 5.3%).