FIELD: chemistry.
SUBSTANCE: invention relates to a crystalline form of ivabradine oxalate, which is characterised by diffraction peaks on an X-ray pattern obtained via powder X-ray diffraction peaks at angles 2θ of about 2.04, 2.13, 4.26, 7.06, 8.02, 8.53, 9.32, 10.91, 13.63, 15.07, 16.11, 16.44, 17.48, 18.37, 19.32, 20.38, 20.94, 21.95, 23.61, 24.26, 27.54 and 33.07 degrees; or a thermogram obtained via differential scanning calorimetry, which demonstrates one endothermic peak of about 110°C. The invention also relates to a method of producing the disclosed crystalline form.
EFFECT: providing a crystalline form of ivabradine oxalate, which is used as an agent against stenocardia and as an intermediate compound for producing amorphous ivabradine hydrochloride.
6 cl, 4 dwg, 9 ex
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