FIELD: biotechnologies.
SUBSTANCE: invention refers to a method for obtaining [1S-[1α,2α,3β(1S*,2R*),5β]]-3-[7-[2-(3,4-difluorophenyl)-cyclopropylamino]-5-(propylthio)-3H-1,2,3-triazolo[4,5-d]pyrimidine-3-yl]-5-(2-hydroxyethoxy)-cyclopentane-1,2-diol of formula (I) 
.
EFFECT: improving yield of the compound of the formula and its high quality when recrystallisation is not available.
5 cl, 1 tbl, 10 ex
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