POLYPHENOLIC COMPOUNDS FROM PLANTAGO MAJOR L. AND PLANTAGO LANCEOLATA

The chemical composition of plant polyphenols Plantago major L. and lanceolata growing in Uzbekistan was studied. More than 20 compounds, including 7 flavonoids, 9 phenolic acids, 8 hydrolysable tannins, the ages which have been determined using physicochemical methods research isolated from plants. From P. L., along with well-known such as gallic acid, rutin, luteolin, isorhamnetin, hyperoside, quercetin, substances belonging to class tannins – 1,2,3,4,6-penta-O-galloyl-β-D-glucopyranose, 1,2,3-tri-O-galloyl-β-D-glucopyranose, 1,3,4,6-tetra-O-galloyl-β-D-glucopyranose 2 new were hexahydroxydiphenoyl diester-1-(O-2-O-galloyl-β-D-glucopyranoside)-1-(O-β-D-xylopyranoside), hexahydroxydiphenoyl-1-(O-β-D-glucopyranoside) diester)-2-(O-4-O-halloyl-β-D-glucopyranoside).
 aerial part plant, known quercetin-3-rutinoside, quercetin-3-O-β-D-galactopyranoside, kaempferol, rhamnetin, 4 for first time: 3-O-galloyl-4,6-hexahydroxydi-phenoyl-β-D-glucopyranose, 2,3-di-O-galloyl-β-D-glucopyranose, 2-O-bis-digalloyl-4,6-valoneyl-β-D-glucose. Based on results (acid stepwise hydrolysis) physical (UV-, IR-, 1H, 13C NMR spectroscopy) methods, it proved that diester hexahydroxydiphenoyl-1-(O-2-O-galloyl-β-D-glucopyranoside)-1-(O-β-D-xylopyranoside), hexahydroxydiphenoyl-1-(O-β-D-glucopyranoside)-2-(O-4-O-galloyl-β-D-glucopyranoside) (P. L.) 2-O-bis-digalloyl-4,6-valoneyl-β-D-glucose are not described literature previously.