3-((Dimethylamino)acetyl)benzo(b)thiophene hydrochloride 7388-08-1 Benzo(b)thien-3-yl dimethylaminomethyl ketone hydrochloride Benzo(b)thiophene, 3-((dimethylamino)acetyl)-, hydrochloride KETONE, BENZO(b)THIEN-3-YL DIMETHYLAMINOMETHYL, HYDROCHLORIDE