FIELD: medicine, pharmacology.
SUBSTANCE: invention relates to arypyprazole anhydrous crystals B showing characteristic peaks in powdered roentgen rays diffraction at 2θ = 11.0°, 16.6°, 19.3°, 20.3° and 22.1°, specific infrared absorption bands at 2945, 2812, 1678, 1627, 1448, 1377, 1173, 960 and 779 cm-1 in IR-spectrum, endothermic peak at 141.5° in thermogravimetric/differential thermic analysis and endothermic peak at 140.7° C in differential scanning calorimetry, arypyprazole A hydrate, to methods for their preparing, pharmaceutical compositions comprising arypyprazole crystals B and methods for their preparing. Invention provides reduced hygroscopicity of arypyprazole crystals B.
EFFECT: improved preparing method.
57 cl, 14 tbl, 24 ex
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