FIELD: medicine, virology. SUBSTANCE: method involves extraction of lignocellulose raw enriched with polysaccharides at pH 4-14 and raw depleted with polysaccharides at pH 8-14. Extracts were separated from solid particles, mixed, pH value is brought about to 8-14 and formed reaction products were separated by molecular mass at separation degree 18-40 kDa. The end solution containing low-molecular fractions of reaction products is treated with $$$-cation exchange resin up to stable pH value at the range 3-7, separated from solid particles and sterilized. Product is used for recovery chemiotherapy at viral infectious diseases. EFFECT: improved method of preparing. 18 cl, 7 tbl, 9 dwg
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