FIELD: pharmaceuticals.
SUBSTANCE: invention relates to the crystalline form A of the compound by the formula (I), wherein the X-ray powder diffractogram (XPRD) of the crystalline form A comprises characteristic diffraction peaks at the following values of the angle 2θ: 8.60±0.2°, 9.38±0.2°, 10.57±0.2°, 12.54±0.2°, 14.43±0.2°, 15.06±0.2°, 17.22±0.2°, and 25.18±0.2°. The crystalline form of the compound by the formula (I) is intended for application for producing a medicinal product for treating cataracts.
EFFECT: crystalline form A of the compound by the formula (I), exhibiting good stability.
8 cl, 10 dwg, 6 tbl, 3 ex
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