2(1H)-Quinolinone, 7-hydroxy-5-(1-hydroxy-2-((1-methylethyl)amino)butyl)-, monohydrochloride 5-(1-Hydroxy-2-(isopropylamino)butyl)-7-hydroxycarbostyril 77405-41-5 Erythro-5-(1-hydroxy-2-(isopropylamino)butyl)-7-hydroxycarbostyril Hipa-bhcs