1-(3-(4-Fluorobenzoyl)propyl)-4-(ethoxycarbonyl)piperazine hydrochloride 1-Piperazinecarboxylic acid, 4-(4'-fluoro-butyrophenon-1-yl)-, ethyl ester, hydrochloride 1-Piperazinecarboxylic acid, 4-(4-(4-fluorophenyl)-4-oxobutyl)-, ethyl ester, monohydrochloride 26964-73-8 4-(4'-Fluoro-butyrophenon-1-yl)-1-piperazinecarboxylic acid ethyl ester hydrochloride 4-(4-(4-Fluorophenyl)-4-oxobutyl)-1-piperazinecarboxylic acid ethyl ester hydrochloride