3-(Dimethylamino)-1-(3-thienyl)-1-propanone Hydrochloride is an intermediate in the synthesis of rac Duloxetine 3-Thiophene Isomer (D721025). rac Duloxetine 3-Thiophene Isomer Hydrochloride is an isomeric impurity of the antidepressant Duloxetine Hydrochloride (D721000).