FIELD: organic chemistry, biochemistry, pharmacy. SUBSTANCE: invention relates to crystalline forms of 3-(2,4-dichlorobenzyl)-2-methyl-N-(pentylsulfonyl)-3H-benzimidazole-5-carboxamide that are distinguished by data of powder X-rays diffraction. Invention describes also pharmaceutical compositions eliciting hypoglycemic activity and inhibition of activity of PDE5 PDE5, (phosphodiesterase-5) based on these crystalline forms. Invention provides preparing new forms of 3-(2,4- dichlorobenzyl)-2-methyl-N-(pentylsulfonyl)-3H-benzimidazole-5-carboxamide that show stability of physicochemical and biological properties. EFFECT: improved preparing method, valuable properties. 10 cl, 6 dwg, 4 ex
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