83263-57-4 83855-49-6 BL 233 CARBAMIC ACID, (3-(2-HYDROXY-3-((1-METHYLETHYL)AMINO)PROPOXY)PHENYL)-, ETHYL EST Carbamic acid, (3-(2-hydroxy-3-((1-methylethyl)amino)propoxy)phenyl)-, ethyl ester, monohydrochloride