3-Chloropropiophenone is a key intermediate in the synthesis of bupropion hydrochloride, dapoxetine and maraverol. Bupropion hydrochloride is an antidepressant, a blocker of serotonin and chemicalbook renaline absorption by weak neurons, suitable for patients who have little effect on other depressants or cannot tolerate depression, while bupropion hydrochloride can also be used as an adjunct to smoking cessation, viral infection or sexual dysfunction.