2(1H)-Quinolinone, 5-(3-((1,1-dimethylethyl)amino)-2-hydroxypropoxy)-, monohydrochloride 5-(2-Hydroxy-3-tert-butylamino)propoxycarbostyril hydrochloride 5-(3-((1,1-Dimethylethyl)amino)-2-hydroxypropoxy)-2(1H)-quinolinone monohydrochloride 53371-79-2