中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
十八二酸单甲酯 | 18-methoxy-18-oxooctadecanoic acid | 72849-35-5 | C19H36O4 | 328.492 |
—— | (R)-17-hydroxy octadecanoic acid methyl ester | 23548-92-7 | C19H38O3 | 314.509 |
—— | (+)-(S)-17-hydroxystearic acid methyl ester | 19485-99-5 | C19H38O3 | 314.509 |
甲基十八碳-17-炔酸酯 | methyl 17-octadecynoate | 68950-90-3 | C19H34O2 | 294.478 |
甲基15-溴十五烷酸酯 | methyl 15-bromopentadecanoate | 41240-56-6 | C16H31BrO2 | 335.325 |
17-氧代十八酸 | 17-oxo-octadecanoic acid | 16694-38-5 | C18H34O3 | 298.466 |
—— | (S,Z)-methyl 17-hydroxyoctadece-9-enoate | 114127-64-9 | C19H36O3 | 312.493 |
十八烷二酸 | octadecanedioic acid | 871-70-5 | C18H34O4 | 314.466 |
—— | (R)-17-hydroxy octadecanoic acid | 35433-70-6 | C18H36O3 | 300.482 |
—— | (+)-(S)-17-hydroxystearic acid | 34370-59-7 | C18H36O3 | 300.482 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
甲基17-羟基硬脂酸酯 | methyl 17-hydroxystearate | 2380-14-5 | C19H38O3 | 314.509 |
17-氧代十八酸 | 17-oxo-octadecanoic acid | 16694-38-5 | C18H34O3 | 298.466 |
—— | 17-Hydroxystearic acid | 4552-19-6 | C18H36O3 | 300.482 |
The yield of extracellular glycolipid produced by Torulopsis magnoliae is increased three-to five-fold by the addition of suitable compounds to the growing culture. The supplement, which can be a long-chain acid, ester, hydrocarbon, or glyceride, is hydroxylated and converted to hydroxy fatty acid sophorosides. Fatty esters of all chain lengths from C16to C22, including several unsaturated esters, and even-numbered hydrocarbons from C16to C24are readily fermented. Shorter-chain compounds are used poorly or not at all. With compounds of 16 to 18 carbon atoms, hydroxylation occurs at the terminal or penultimate carbon atom, depending on degree of unsaturation and chain length. Substrates of more than 18 carbon atoms are mainly reduced in chain length by one or more two-carbon units and hydroxylated, giving C17or C18acids with the hydroxyl group on the penultimate carbon atom. The various enzymic reactions which occur during the fermentation are discussed.
The oil formed during fermentation by a strain of Torulopsismagnoliae consisted mainly of partly acetylated 2-O-β-D-glucopyranosyl-D-glucopyranose units attached β-glycosidically to 17-L-hydroxyoctadecanoic and 17-L-hydroxy-9-octadecenoic acids.