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.