FIELD: chemistry.
SUBSTANCE: invention refers to new anhydrous crystalline forms of saxagliptin hydrochloride of formula presented below 
There are described methods for producing the crystalline forms of saxagliptin hydrochloride.
EFFECT: crystalline forms of saxagliptin inhibit dipeptidylpeptidase-4.
13 cl, 4 tbl, 11 dwg, 5 ex
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