Synonyms : (R*, S*)-(+-)-8-Hydroxy-5-(1-hydroxy-2-((1-methylethyl)amino)butyl)-2(1H)-quinolinone, CI-888, OPC-2009, Pro-Air, Procaterol Hydrochloride, Procaterol Monohydrochloride, Procaterol Monohydrochloride, (R*, R*)-(+)-Isomer, Procaterol, (R*, R*)-(+-)-Isomer, CI 888