FIELD: chemistry.
SUBSTANCE: invention relates to polymorphous form of compound of formula I
formula I.
Polymorphic form relates to form II, and its X-ray powder diffraction pattern has characteristic peaks at diffraction angles 2θ, making approximately 7.5°, 19.0° and 31.2° ± 0.2°. Also disclosed is a method of producing a polymorphous form.
EFFECT: presented polymorphous form II has higher bioavailability.
7 cl, 3 dwg, 1 tbl, 26 ex
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