4 '-{2-(1S, 2R) -2-hydroxy-2- (4-hydroxyphenyl) -1-methylethylamino ethoxy} -3-isopropyl-3', 5'-dimethylbiphenylcarboxylic acid Polymorph of salt

摘要

Of 4 ′-{2-[(1S, 2R) -2-hydroxy-2- (4-hydroxyphenyl) -1-methylethylamino] ethoxy} -3-isopropyl-3 ′, 5′-dimethylbiphenylcarboxylic acid Provided are α-form, β-form and γ-form crystals that can be distinguished by a characteristic diffraction peak of powder X-ray diffraction produced by treating hydrochloride with a specific solvent. The crystals according to the present invention, particularly the α-form, β-form and γ-form crystals, have no problem of residual solvent and are excellent in stability during storage.