title: Chemical Variability of Ivoirian Xylopia rubescens Leaf Oil.
abstract: 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 by13C-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%).
authors.affiliation: UMR 6134 SPE, Equipe Chimie et Biomasse, Université de Corse-CNRS, Route des Sanguinaires, FR-20000, Ajaccio.|Laboratoire de Chimie Organique Biologique, UFR-SSMT, Université Félix Houphouët-Boigny, BPV 34, Abidjan, Côte d'Ivoire.
authors.forename: Thierry Acafou
authors.initials: TA
authors.lastname: Yapi
authors.affiliation: Laboratoire de Chimie Organique Biologique, UFR-SSMT, Université Félix Houphouët-Boigny, BPV 34, Abidjan, Côte d'Ivoire.
authors.forename: Jean Brice
authors.initials: JB
authors.lastname: Boti
authors.affiliation: Laboratoire de Chimie Organique Biologique, UFR-SSMT, Université Félix Houphouët-Boigny, BPV 34, Abidjan, Côte d'Ivoire.
authors.forename: Zanahi Félix
authors.initials: ZF
authors.lastname: Tonzibo
authors.affiliation: Laboratoire de Chimie Organique Biologique, UFR-SSMT, Université Félix Houphouët-Boigny, BPV 34, Abidjan, Côte d'Ivoire.
authors.forename: Coffy Antoine
authors.initials: CA
authors.lastname: Ahibo
authors.affiliation: UMR 6134 SPE, Equipe Chimie et Biomasse, Université de Corse-CNRS, Route des Sanguinaires, FR-20000, Ajaccio.
authors.forename: Ange
authors.initials: A
authors.lastname: Bighelli
authors.affiliation: UMR 6134 SPE, Equipe Chimie et Biomasse, Université de Corse-CNRS, Route des Sanguinaires, FR-20000, Ajaccio.
authors.forename: Joseph
authors.initials: J
authors.lastname: Casanova
authors.affiliation: UMR 6134 SPE, Equipe Chimie et Biomasse, Université de Corse-CNRS, Route des Sanguinaires, FR-20000, Ajaccio.
authors.forename: Félix
authors.initials: F
authors.lastname: Tomi
mesh_terms: D007560:Cote d'Ivoire; D008401:Gas Chromatography-Mass Spectrometry; D009682:Magnetic Resonance Spectroscopy; D009822:Oils, Volatile / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D010938:Plant Oils / Q000737:chemistry*; D025341:Principal Component Analysis; D054336:Xylopia / Q000737:chemistry*
chemical_list: D009822:Oils, Volatile; D010938:Plant Oils
keywords: 
  Xylopia rubescens
  ; (8Z,11Z,14Z)-Heptadeca-8,11,14-trien-2-one; Chemical variability; Furanoguaia-1,4-diene; Leaf essential oil