FIELD: chemistry.
SUBSTANCE: invention relates to crystals of 3-{5-[4-(cyclopentyloxy)-2-hydroxybenzoyl]-2-[(3-hydroxy-1,2-benzisoxazol-6-yl)methoxy]phenyl}-propionic acid. The crystals are characterised by peaks at positions 14.0, 16.0, 23.3, 23.7 and 26.3° (form II) and at positions 14.6, 23.1, 24.7, 25.6 and 26.0° (form III) at diffraction angle 2θ on an X-ray powder pattern.
EFFECT: said propionic acid compounds have low specific volume, are not well charged with electricity and can be used as an active pharmaceutical ingredient of antirheumatic medicinal agents.
2 cl, 3 dwg, 4 tbl, 7 ex
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