FIELD: organic chemistry, medicine.
SUBSTANCE: invention relates to crystalline polymorph of 2-[4-(2-[[(1S,2R)-2-hydroxy-2-(4-hydroxyphenyl)-1-methylethyl]amino]ethyl]phenoxy]acetic acid exhibiting strong diffraction peaks (diffraction angle is 2θ ± 0.1o) at 10.8, 19.1, 19.3, 19.8, 20.6 and 27.0o in diffractogram obtained by method of powder X-ray diffraction analysis that elicits strong stimulating effect with respect to β2- and β3-adrenoceptors and useful as a medicinal agent for pain relief and promoting to removing calculi in urolithiasis.
EFFECT: valuable medicinal properties of polymorph.
3 dwg, 7 ex
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