Extinction Risk Assessment and Chemical Composition of Aerial Parts Essential Oils from Two Endangered Endemic Malagasy Species.

Seven essential oil samples of two endemic species of Malagasy sage, Baker and Baker, were investigated via GC(RI), GC-MS and C NMR spectrometry. In total, 81compounds were identified accounting for 93.5% to 98.

A Validated H NMR Method for the Quantitation of 5-Hydroxymethyl-2(5H)-Furanone, a Valuable Chemical Intermediate, In a Dichloromethane Extract of subsp: C Leaves from Corsica.

An experimental procedure using H NMR was developed and validated to quantify 5-hydroxymethyl-2(5H)-furanone, a valuable chemical synthon ((S)-enantiomer), in a dichloromethane extract of subsp. leaves. This method, using vanillin as the internal standard, exhibited a perfect linearity of measurements (  = 1) associated with very good accuracy (relative errors comprised between -1.

Chemical composition of root and stem bark essential oils from Ivorian : structural elucidation of a new natural germacrone.

The root and stem bark essential oils from Isolona dewevrei (Annonaceae), growing wild in Côte d'Ivoire, were investigated for the first time, using a combination of chromatographic [CC, GC(RI)] and spectroscopic [MS, C-NMR] techniques. A new natural germacrone was isolated by repetitive column chromatography carried out on a stem bark oil sample. Its structure was elucidated as germacra-1(10),4(15),5-trien-8-one by 1 D, 2 D-NMR and QTOF-MS.

New Compounds from the Roots of Corsican (Poir.) Link.: Two Pterocarpans and a Dihydrobenzofuran.

Three new compounds, a dihydrobenzofuran (coumaran) derivative (compound ) and two pterocarpans (compounds and ) were isolated from a root extract of growing wild in Corsica. Their structures were elucidated using 1D and 2D NMR spectroscopy and MS/MS as 2-(1-methylethenyl)-5-hydroxy-6-carbomethoxy-2,3-dihydro-benzofuran, 4,9-dihydroxy-3-methoxy-2-dimethylallylpterocarpan, and 4,9-dihydroxy-3',3'-dimethyl-2,3-pyranopterocarpan.

Chemical Composition of Aerial Parts Essential Oils from Six Endemic Malagasy Species.

The essential oils of six endemic Malagasy species were investigated by GC (RI), GC-MS and C NMR spectrometry. In total, 153 compounds were identified accounting for 90.8% to 99.

Identification and Quantitation of Ursolic and Oleanolic Acids in L. Leaf Extracts Using C and H-NMR Spectroscopy.

Leaves of L. have been used for their therapeutic properties. In previous studies, components contained in the leaves were first isolated by various chromatographic techniques.

Composition and Intraspecific Chemical Variability of Leaf Essential Oil of Laggera pterodonta from Côte d'Ivoire.

The chemical composition of 44 leaf oil samples of Laggera pterodonta (DC.) Sch.Bip.

Chemical characterisation of essential oils of leaves of two Solanaceae: and from Côte d'Ivoire.

This study made it possible to characterise by GC (in combination with retention indices), GC-MS and C NMR, the chemical composition of the essential oils from and , two Solanaceae of the Ivorian flora. The two essential oils were characterised by a very high proportion of sesquiterpenes. Specifically, the essential oil of was dominated by (E)--caryophyllene (33.

Two new eudesman-4α-ol epoxides from the stem essential oil of from Côte d'Ivoire.

The investigation of the stem essential oil of (DC.) Sch. Bip.

Identification and Quantitative Determination of Resin Acids from Corsican Pinus pinaster Aiton Oleoresin Using C-NMR Spectroscopy.

Twenty-three resin samples have been obtained by tapping from individual Pinus pinaster adult trees grown in Corsica and submitted to acido-basic partition. Identification and quantitative determination of resin acids has been carried out using C-NMR spectroscopy following a method developed by our group. The main components were dehydroabietic acid (up to 37.

New -β-bergamotene derivatives in the root and the flower essential oils of (L.) H. Rob. from Côte d'Ivoire.

Root and flower essential oils of (L.) H. Rob.

Chemical composition of the essential oils from the aerial parts of two Malagasy endemic species (Apiaceae): Billburttia capensoides Sales & Hedge and Billburttia vaginoides Sales & Hedge.

The chemical composition of twenty-five essential oil samples from the aerial parts of two Malagasy endemic species Billburttia capensoides Sales & Hedge and B. vaginoides Sales & Hedge, were investigated for the first time. Based on chromatographic profiles, three selected samples were investigated using GC(RI), GC-MS and C NMR.

New Metabolites Isolated from a Laurencia obtusa Population Collected in Corsica.

The chemical investigation of an ethyl acetate extract (EtOAc) obtained from , collected in Corsica, allowed for the identification of three new compounds (, , and ) and six known compounds. Compounds to were isolated and fully characterized by a detailed spectroscopic analysis. Compounds and are two C-acetogenins sharing the same ring system: a tetrahydropyran linked by a methylene to a tetrahydrofuran ring.

Discrimination and Characterization of Two Mediterranean Species from the Laurencia Complex (Rhodomelacea) Using an NMR-Based Metabolomic Approach.

Generic and specific determination among the Laurencia complex is a challenging task. DNA barcoding combined with phenotypic investigations are mandatory for species differentiation. In this study, two morphologically different members of the Laurencia complex were investigated using untargeted H-NMR-based metabolomics.

Chemical Composition of Laurencia obtusa Extract and Isolation of a New C-Acetogenin.

A new C-acetogenin, sagonenyne (), exhibiting an unusual single tetrahydropyran ring was isolated from an ethyl acetate extract of collected on the Corsican coastline. Its structure was established by detailed NMR spectroscopic analysis, mass spectrometry, and comparison with literature data. Twenty-three known compounds were identified in the same extract by means of column chromatography steps, using a C-NMR computer aided method developed in our laboratory.

Chemical compositions of essential oils of five introduced conifers in Corsica.

The aim of this survey was to determine the chemical composition of essential oils (EO) of five conifers acclimated in Corsica by GC(RI), GC-MS and C NMR. L. decidua needle and wood EOs contained as majors components: α- and β-pinenes, germacrene D (needles) and bornyl acetate (wood).

Composition and Variability of Leaf Oil from Monodora crispata - ¹³C NMR Identification of Heat-sensitive Compounds.

The composition of four samples of essential oil isolated from the leaves of individual Monodora crispata trees growing wild in an Ivorian forest (Adiopodoum6) were investigated by a combination of chromatographic (GC(RI)) and spectrometric (GC-MS, "C NMR) techniques. In total, fifty-seven compounds accounting for 92.3-98.

Chemical Variability of Ivoirian Xylopia rubescens Leaf Oil.

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 C-NMR and 24 components (78.

Composition and Chemical Variability of Cleistopholis patens Trunk Bark Oil from Côte d'Ivoire.

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 C-NMR.

Integrated Analysis of the Wood Oil from Xanthocyparis vietnamensis Farjon & Hiep. by Chromatographic and Spectroscopic Techniques.

In order to get better knowledge about the volatiles produced by Xanthocyparis vietnamensis, a species recently discovered in Vietnam, its wood oil has been analyzed by a combination of chromatographic (GC, CC) and spectroscopic (GC-MS, (13)C-NMR) techniques. Forty components that accounted for 87.9% of the oil composition have been identified.

The Genus Myrtus L. in Algeria: Composition and Biological Aspects of Essential Oils from M. communis and M. nivellei: A Review.

The genus Myrtus L. (Myrtaceae family) comprises two species, Myrtus communis L. (known as common myrtle) growing wild all around the Mediterranean basin and Myrtus nivellei Batt.

Composition and Chemical Variability of the Needle Oil from Pinus halepensis growing in Corsica.

The composition of oil samples isolated from needles of Pinus halepensis growing in three locations in Corsica (Saleccia, Capo di Feno, and Tre Padule) has been investigated by combination of chromatographic (GC with retention indices) and spectroscopic (MS and (13)C-NMR) techniques. In total, 35 compounds that accounted for 77 - 100% of the whole composition have been identified. α-Pinene, myrcene, and (E)-β-caryophyllene were the major component followed by α-humulene and 2-phenylethyl isovalerate.

Chemical Composition and Antimicrobial Activity of the Essential Oil from Aerial Parts of Algerian Pulicaria mauritanica.

One oil sample isolated from aerial parts of Pulicaria mauritanica Coss. from Western Algeria has been analyzed by GC(RI), GC-MS and ¹³C NMR. In total, 21 components, accounting for 97.