The intestinal worm, Ascaris lumbricoides, ferments carbohydrate to a mixture of end products, of which the two major ones are Z-methylbutyrate and 2-methylvalerate. The mode of formation of branched chain acids with a methyl group at C-2 or other even numbered carbon atoms is still not completely understood. It has been proposed that these compounds could be formed either from the fatty acid s...

Monoethyl malonate (1) and tert-butyl alcohol are esterified by catalysis with dicyclohexylcarbodiimide and 4-dimethylaminopyridine to yield ethyl t-butyl malonate (2). The ethoxymagnesio derivative (3) of the ester is condensed with β-carbomethoxypropionyl chloride to give the triester (4), which is decomposed by heating under vacuum in the presence of β-naphthalensulfonic acid to give ethyl m...

The need to understand and control ester synthesis is driven by the fact that esters play a key role in the sensorial quality of fermented alcoholic beverages like beer, wine and sake. As esters are synthesized in yeast via several complex metabolic pathways, there is a need to gain a clear understanding of ester metabolism and its regulation. The individual genes involved, their functions and ...

Since the isolation and identification of the sesquiterpene antibiotic pentalenolactone (1),1-7) several other related metabolites have been recognized in strains of Streptomyces, notably pentalenolactones E (2),8,9) G (3),10) and H (4),11) pentalenic acid (5),11,12) and the parent hydrocarbon, pentalenene (6).11-15)* Besides their novel structural features, these compounds are all potential in...

background and objectives: lauroyl arginine ethyl ester (lae) has been focused as a new active compound with antimicrobial property for food preservative. because of environmental concerns, the incorporation of preservatives into biodegradable films is more suitable than their incorporation into plastic films.the aim of this work was to develop antimicrobial including lae in bio zein matrix and...

The ethyl acetate soluble fraction from the roots of Sanguisorba tenuifolia was found to have a hypoglucemic effect in alloxan-induced diabetic rats. Two new triterpenoids, identified as 2-oxo-3β,19α-dihydroxyolean-12-en-28-oic acid β-D-gluco-pyranosyl ester (1) and 2α,19α-dihydroxy-3-oxo-12-ursen-28-oic acid β-D-glucopyranosyl ester (4) were isolated from this fraction, along with thirteen kno...

Background: Vitiligo is an acquired disease of skin that presents with depigmented patches due to lack of melanocytes in the epidermis. Accumulation of toxic free radicals like hydrogen peroxide in the epidermis may be responsible for melanocytes death. Since ethyl vanillate (vanillic acid ethyl ester) is a strong hydrogen peroxide scavenger, it may be effective against vitiligo. This study was...

In the crystal structure of the title compound, C(4)H(10)NO(2) (+)·Cl(-) (systematic name: 3-eth-oxy-3-oxopropan-1-aminium chlor-ide), there are strong inter-molecular N-H⋯Cl, C-H⋯Cl and C-H⋯O hydrogen-bonding inter-actions between the free chloride anion and the organic cation, resulting in a two-dimensional supra-molecular network in the ab plane.