FIELD: chemistry.
SUBSTANCE: invention relates to crystalline forms I and II of compound 2-chloro-4-[(3S,3aR)-3-cyclopentyl-7-(4-hydroxy-1-carbonyl)-3,3a, 4.5-tetrahydro-2H-pyrazolo[3.4-f]quinolin-2-yl]benzonitrile of formula (I), used as a mineralocorticoid receptor antagonist. Crystalline forms have characteristic peaks of powder X-ray diffraction pattern specified in the claims. The invention also relates to processes for preparing crystalline forms I and II and the use of the obtained crystal forms in the manufacture of medicaments for the treatment and/or prevention of kidney damage or cardiovascular diseases.
EFFECT: obtained crystalline form the compound of formula amorphous form of its superior stability, not only at high temperature and humidity, and light conditions.
16 cl, 4 dwg, 4 tbl, 10 ex
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