ISOLATION AND STUDY OF PROANTHOCYANIDINS FROM BARK OF CEDAR PÍNUS SIBÍRICA

The yields of proanthocyanidins isolated from the initial and deresinated (extracted with hexane) bark Siberian cedar (Pínus sibírica) by water, 15% water-ethanol solution ethyl acetate in a Soxhlet apparatus were compared. It was shown, that preliminary removal resinous substances does not affect extracted water (for is 0.44% (wt.) 0.57% for 0.43% (wt.), respectively). established extraction makes it possible to increase yield about 2 times 1.04% (wt.). composition characterized UV, FTIR, 13C NMR spectroscopy methods. flavonoids cyanidin delphinidin identified using conversion anthocyanidins. mainly consist procyanidin prodelphinidin, regardless method their isolation – aqueous ethanol or acetate. cedar, contrast those pine (Pinus maritima) radiata), contain gallic acid residues.