85462-80-2 BENZO(b)THIOPHENE-2-CARBOXYLIC ACID, 4,5,6,7-TETRAHYDRO-2-(3-((1,1-DIMETHYLETHYL Benzo(b)thiophene-2-carboxylic acid, 4,5,6,7-tetrahydro-2-(3-((1,1-dimethylethyl)amino)-2-hydroxypropoxy)-, ethyl ester, hydrochloride