83263-75-6 83855-51-0 BL 243 CARBAMIC ACID, (4-(2-HYDROXY-3-((1-METHYLETHYL)AMINO)PROPOXY)PHENYL)-, ETHYL EST Carbamic acid, (4-(2-hydroxy-3-((1-methylethyl)amino)propoxy)phenyl)-, ethyl ester, monohydrochloride