76981-89-0 BENZO(b)THIOPHENE-3-CARBOXYLIC ACID, 4,5,6,7-TETRAHYDRO-5-METHYL-2-(2-PIPERIDINO BRN 5611167 Benzo(b)thiophene-3-carboxylic acid, 4,5,6,7-tetrahydro-5-methyl-2-(2-piperidinoacetamido)-, ethyl ester