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Gas-liquid chromatographic separation of aldose enantiomers as trimethylsilyl ethers of methyl 2-(polyhydroxyalkyl)thiazolidine-4(R)-carboxylates

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TLDR
In this paper, pairs of enantiomers of nine aldoses were separated by gas-liquid chromatography on an OV-17 capillary column as the trimethylsilyl ethers of methyl 2- (polyhydroxyalkyl) -thiazolidine-4 (R) -carboxylates.
Abstract
Pairs of enantiomers of nine aldoses were separated by gas-liquid chromatography on an OV-17 capillary column as the trimethylsilyl ethers of methyl 2- (polyhydroxyalkyl) -thiazolidine-4 (R) -carboxylates, which were obtained by the reaction of aldoses with L-cysteine methyl ester. This method was applied to the determination of the absolute configurations of the component monosaccharides of a Thladiantha saponin.

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Facile Discrimination of Aldose Enantiomers by Reversed-Phase HPLC

TL;DR: The reaction was applied to the determination of absolute configuration the sugar residues of an aroma precursor and direct HPLC analysis of the reaction mixture and UV detection at 250 nm discriminated D- and L-enantiomers of aldoses.
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Production, extraction and characterization of microalgal and cyanobacterial exopolysaccharides.

TL;DR: The aim of this review is to do the state of the art of processes for exopolysaccharide production and extraction from microalgal biomass and the analytical strategies for their characterization.
Journal ArticleDOI

Steroidal saponins from fruits of Tribulus terrestris

TL;DR: The structures of the new saponins were elucidated on the basis of spectroscopic analyses, including two-dimensional NMR techniques, and chemical reactions.
Journal ArticleDOI

Isolation of an antiviral polysaccharide, nostoflan, from a terrestrial cyanobacterium, Nostoc flagelliforme.

TL;DR: Besides anti-HSV-1 activity, nostoflan showed potent antiviral activities against HSV-2, human cytomegalovirus, and influenza A virus, but no activity against adenovirus and coxsackie virus was observed.
Journal ArticleDOI

Phenolic constituents from the flower buds of Lonicera japonica and their 5-lipoxygenase inhibitory activities.

TL;DR: In this article, 13 phenolic constituents, luteolin (1), protocatechuic acid (2), caffeic acid(3), flavoyadorininin-B (4), 4,5-dicaffeoylquinic acid, rhoifolin (12), chlorogenic acid (13), and a novel phenolic glucoside benzoate, vanillic acid 4-O-β-d -(6-Obenzoylglucopyranoside) (6), were isolated from the flower buds of Lonic
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