2-(Dimethylamino)-2-methylpropyl benzo(b)thiophene-3-carboxylate hydrochloride 85179-98-2 BENZO(b)THIOPHENE-3-CARBOXYLIC ACID, 2-(DIMETHYLAMINO)-2-METHYLPROPYL ESTER, HYD Benzo(b)thiophene-3-carboxylic acid, 2-(dimethylamino)-2-methylpropyl ester, hydrochloride