FIELD: chemistry.
SUBSTANCE: invention relates to novel crystalline modifications of [6-methoxy-5-(2-methoxyphenoxy)-2-pyridin-4-ylpyrimidin-4-yl]amide-5-methylpyridine-2-sulfonic acid, which produces an endothelial antagonistic effect and is suitable for treating diseases associated with abnormal vascular tone and endothelial dysfunction, such as heart failure, pulmonary hypertension etc. The crystalline modification which is denoted modification B is characterised by a powder X-ray diffractogram with characteristic peaks expressed through the d-parametre value (interplanar distance) (Å) obtained on a conventional X-ray powder diffractometre using Cuka radiation: 10.7 (m), 9.4 (m), 8.6 (vs), 8.3 (m), 7.6 (m), 6.7 (m), 6.4 (m), 6.0 (m), 5.69 (m), 5.30 (m), 5.17 (m), 4.95 (vs), 4.76 (m), 4.56 (m), 4.43 (s), 4.13 (vs), 3.80 (s), 3.45 (s), 3.41 (s), 3.37 (s) and 3.03 (m). The invention also relates to crystalline pseudopolymorphous modifications of [6-methoxy-5-(2-methoxyphenoxy)-2-pyridin-4-ylpyrimidin-4-yl]amide-5-methylpyridine-2-sulfonic acid selected from: a) pseudopolymorphous modification, solvate with ethanol, denoted modification D; b) pseudopolymorphous modification, polysolvate with acetone, denoted modification E; c) pseudopolymorphous modification, solvate with tetrahyrofuran, denoted modification F; d) pseudopolymorphous modification, solvate with methanol, denoted modification G; e) pseudopolymorphous modification, solvate with isopropanol, denoted modification H; f) pseudopolymorphous modification, solvate with dichloromethane, denoted modification I; and g) pseudopolymorphous modification, solvate with 2-butanol, denoted modification J. The invention also relates to a method of obtaining crystalline modification B, a pharmaceutical composition and use.
EFFECT: wider field of use of the compounds.
8 cl, 9 dwg, 9 tbl, 12 ex
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