CARBOHYDRATE COUSINIA ANGRENI JUS (ASTERACEAE), ESTABLISHING THE STRUCTURE OF THEIR GLU-COFRUCTANS
UDC 547.917 (575.2)(04)
Abstract
Currently, a lot of attention is paid to a number of researchers oligo – and polysaccharides. This is due to their high content in plant materials and the fulfillment of a special role in the development of living organisms, which is of great importance in the production of fructose, sucrose and inulin.
Kyrgyzstan has huge reserves of still little-studied, environmentally friendly medicinal and other plant species.
The article deals with the study of the chemical composition of the carbohydrate complex in plants of the genus Cousinia angreni Jus. Experimental studies have been carried out to isolate and establish structures of water-soluble polysaccharides and alcohol-soluble oligosaccharides. Glucofructan was isolated from the roots of Cousinia angreni Jus, the structure of individual fractions was studied by methylation, periodic oxidation, paper chromatography, thin-layer chromatography and GLC, IR and 13C-NMR spectroscopy.
When compared with witnesses, 2,3,4,6-tetra-O-Me-D-glucose, 1,3,4,6-tetra-O-Me-D-fructose, 3,4,6-tri-O-Me-D-fructose (main product) and trace amounts of 1,3,4-tri-O-Me-D-fructose. The presence of the main product 3,4,6-tri-O-Me-D-fructose indicates the predominance of β-(2→1) bonds. Thus, it was found that glucofructans of the Angren cousin (C. angreni Jus) consist of fructofuranose residues linked by β-(2→1) inulin type bonds.
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