Crystals of hydroxynorephedrine derivative

摘要

The present invention provides ethyl (-)-2-[4-[2-[[(1S,2R)-2-hydroxy-2-(4-hydroxyphenyl)-1-methylethyl]amino]ethyl]-2,5-dimethylphenoxy]acetate hydrochloride, crystalline forms thereof and pharmaceutical compositions containing them, which have excellent beta3-adrenoceptor stimulating effects, therapeutic effects on pollakiuria or urinary incontinence and storage stabilities and are useful as a medicament.