9,12-Octadecadienoic acid methyl ester

Synonyms 9,12-octadecadienoic acid, methyl ester. Comments methyl linoleate is used in cosmetics as an emollient. The EINECS number for methyl linoleate is 203-993-0. [Pg.414]

Methyl Ltnoleate, 9,12-Octadecadienoic acid methyl ester. Ci9HmO, mol wt 294.46. C 77.49%, H... [Pg.958]

CAS 112-63-0 EINECS/ELINCS 203-993-0 Synonyms Methyl cis,cis-9,12-octadecadienoate 9,12-Octadecadienoic acid methyl ester... [Pg.1202]

Octadecadienoic acid methyl ester. See Methyl llnoleate... [Pg.1227]

Octadecadienoic acid methyl ester See Methyl linoleate... [Pg.2241]

Qualitatively, the El mass spectra of the methyl esters of CLA isomers are indistinguishable from one another and from methylene-interrupted octadecadienoic acid methyl esters such as linoleate (54,55), although there may be some differences in the relative intensities of some ions. Consequently, they are of limited use in the analysis of CLA mixtures. However, GC-EIMS of methyl esters is useful for distinguishing CLA peaks from other fatty acids that elute in the same region of the chromatogram (13) (see below). [Pg.25]

Fig. 3.22. Autoxidation of linoleic acid methyl ester. Analysis of primary products (after reduction of the hydroperoxy group) by HPLC (according to Chan and Levett, 1977). 1 13-Hydroxy-cis-9, trans-ll-octadecadienoic acid methyl ester, 2 13-hydroxytrans-9,trans-ll-octadecadienoic acid methyl ester, 3 9-hydroxy-trans-lO, cis-12-octadecadienoic acid methyl ester, 4 9-hydroxy-trans-lO, trans-12-octa-decadienoic acid methyl ester...

F g- 4.13. Chromatograms of autoxidized fatty acid methyl esters (FAME) kept in glass vials, exposed to O2 and ambient light for 8 d for (A) methyl linoleate, (B) c9,f1l-18 2, and (C) tl0,cl2-18 2. Chromatogram A indicates labeled peaks for pentanal (C -al), hexanal (Cg-al), f2,f4-decadienal (C Q-dienal), methyl stearate (is), methyl 9-oxo-nonanoate (9-oxo-FAME) and methyl linoleate (c9,cl2-C g.2-FAME). Chromatogram B also has labeled heptanal (C -al), 2-heptenal (C7.-,-al), 2-nonenal (C. -al), methyl 9,12-epoxy-9,11-octadecadienoate (Fg 2)/ chromatogram C has additionally labeled methyl nonanoate (Cg-FAME), 2-octenal (Cg. -al), methyl 10-oxo-decanoate (10-oxo-FAME) and methyl 10,13-epoxy-10,12-octadecadienoate (F q 3). [Pg.73]

Quantitative changes in lipid compounds on the silk and cuticle of females correlate significantly with changes in female sexual receptivity in spiders. For example, female T. atrica attach a contact sex pheromone to their web (Trabalon et al., 1997,2005 Prouvost et al., 1999). This pheromone consists of a complex mixture of saturated hydrocarbons, methyl esters (methyl tetradecanoate, methyl pentadecanoate, methyl hexadecanoate, and methyl octadecanoate) and their fatty acids (tetradecanoic, pentadecanoic, hexadecanoic, and cis,cis-9,12-octadecadienoic acids). The female uses cuticular compounds, which are applied to the silk in substantial amounts during web construction. Modification of chemical profiles makes the female attractive to males (Trabalon et al., 2005). Receptive females are different to unreceptive ones with respect to three fatty acids (hexadecanoic, octadeca-dienoic and octadecenoic acids) and three methyl esters (linoleate, oleate, and stearate) present on both the web and the cuticle. Our combined results from chemical analyses and behavioral assays demonstrate clearly that these contact compounds are quantitatively correlated with the behavior of spiders. [Pg.353]

Octadecadienoic acid, 1-[[[(2-aminoethoxy)hydroxyphosphinyl]oxy]methyl]-1,2-ethanediyl ester, (ail-Z)- 4249 ... [Pg.416]

Octadecadienoic acid (Z,Z)-, methyl ester methyl linoleate ... [Pg.1086]

Octadecadienoic acid 2-[(1 -oxohexadecyl)oxy]-I-[[(I-oxohexadecyl)oxy]methyl]ethyI ester, 90 C53H98O6 M 831.354 (all-Z)-form [2442-56-0] a,a -Dipalmitolinolein Cryst. Mp 25.5-26 . [Pg.643]

Octadecadienoic acid 2-[(l-oxo-9-octadecenyl)-oxy] -/-[[(/ -oxo-9-octadecenyl)oxy]methyl]ethyl ester,... [Pg.651]

Octadecadienoic acid I-[[[ 2-aminoethoxy)-hydroxyphosphinyl] oxy] methyl] -2- [ (7 -oxooctadecyl) -oxy]ethyl ester, 90.1-Octadecanoyl-2-octadeca-9,l2-dienoylglycero-3-phosphoethanolamine... [Pg.662]

Octadecadienoic acid 1-(hydroxy methyl)-2- [(1 -oxooctadecyl)-oxy] ethyl ester, see G-00191... [Pg.851]

Octadecadienoic acid 1-[[(1-oxododecyl)oxy] methyl] -1,2-ethanediyl ester, see G-00058... [Pg.851]

Preparation from [i- C] Linoleic Acid. (9Z,llf )-[l-i" C]-Octadecadienoic acid was prepared by incubating [l-i" C]-linoleic acid with an enzyme, Unoleate isomerase, obtained from the rumen bacterium Butyrivibrio fibrisolvens (11). This isomerization was carried out with a mixture of 0.2 mL of the enzyme preparation, [l-i" C]-linoleic acid (0.2 pCi 0.12 mg) and 4 mg of bovine serum albumin in 1 mL of 0.1 moI/L potassium phosphate buffer (pH 7). After separation of fatty acids from the reaction mixture and formation of methyl esters with diazomethane, methyl (9Z,ll )-[l-i C]-octadecadienoate was purified by preparative silver nitrate thin-layer chromatography. [Pg.94]

It has been possible to show with the help of adsorption TLC, that isomers are formed when the methyl esters of unsaturated fatty acids are ozonised each of the isomers from methyl oleate has been isolated in a pure state [175]. Compounds which are not easily fractionated by argentation TLC, like as-methyl octadecenoate (methyl oleate) and mw5- mw5-methyl octadecadienoate (trans-trans methyl hnoleate ) or the corresponding triglycerides, have been separated as their ozonides [170]. This method is suitable, however, only for lipids with up to four double bonds. Ozone reacts with more highly unsaturated compounds to form short chain ozonides and undelfined side products [170]. [Pg.408]

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