Variations in Essential Oils from South Siberian Conifers of the Pinaceae Family: New Data towards Identification and Quality Control was written by Romanenko, Elena P.;Domrachev, Dmitry V.;Tkachev, Alexey V.. And the article was included in Chemistry & Biodiversity in 2022.Recommanded Product: 105-87-3 This article mentions the following:
Conifer essential oils have been used for centuries in traditional medicine, and nowadays they are of special interest for official medicine, aromatherapy and perfumery. In the present work, comprehensive information is given on the composition of essential oils prepared from the twigs of the conifer trees of the pine family (Pinaceae): Abies sibirica Ledeb., Larix sibirica Ledeb., Picea obovata Ledeb., Pinus sibirica Du Tour, Pinus sylvestris L. A total of 50 samples of essential oils have been studied. The samples were prepared during vegetation stage in the time period 1998-2012 from the growing wild trees in the South part of the Western Siberia (Russian Federation) and neighboring territories of Republic of Kazakhstan within the area with geog. coordinates LAT 49.180012-57.908583 and LON 83.213217-91.258717 at elevation of 82-2070 m above sea level. All the essential oil samples were obtained from freshly collected plant raw material by steam distillation at atm. pressure in stainless steel apparatus, which had been specially designed for field research. All the chromatog. profiles were prepared from authentic samples whose voucher specimens are deposited at the Central Siberian Botanical Garden of the Siberian Branch of the Russian Academy of Sciences (NS). The following information for each sample is provided: (1) date and location of the plant raw material collecting, indicating administrative areas and the exact geog. coordinates; (2) yield of essential oil, (3) chem. composition of the essential oil sample based on GC/MS experiments using full mass-spectra (EI, 70 eV) and linear retention indexes of the components, (4) results of GC-FID quantification based on internal standards and response factors, (5) enantiomeric composition of the main components based on GCxGC experiments using the 2nd column with cyclodextrin-based chiral selector, (6) GC profile of the high-boiling fractions indicating the characteristic sesquiterpenoids. Therefore, this study provides reliable information about the variability and true composition of the Siberian conifer oils, and the exptl. data given can serve as reference chromatog. profiles of volatile substances to solve the problems of quality, authenticity and safety. In the experiment, the researchers used many compounds, for example, (E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3Recommanded Product: 105-87-3).
(E)-3,7-Dimethylocta-2,6-dien-1-yl acetate (cas: 105-87-3) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Recommanded Product: 105-87-3
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics