2-(4-Bromophenyl)-N-ethylacetamide (cas# 223555-90-6) can be used in the preparation of N-?substituted 2-?oxo-?6-?(trifluoromethyl)?-?1,?2-?dihydropyridine-?3-?carboxamides as modulators of HSD17B13. It is also used in the preparation of piperazinylisoquinolines and analogs as serotonin antagonists.