5-[2-[4-(4-fluorobenzoyl)piperidin-1-yl]ethyl]-5,6-dihydrocyclopenta[b]thiophen-4-one
5-[2-[4-(4-fluorobenzoyl)-1-piperidyl]ethyl]-5,6-dihydrocyclopenta[b]thiophen-4-one
5-[2-[4-[(4-fluorophenyl)-oxomethyl]-1-piperidinyl]ethyl]-5,6-dihydrocyclopenta[b]thiophen-4-one
5-[2-[4-(4-fluorophenyl)carbonylpiperidin-1-yl]ethyl]-5,6-dihydrocyclopenta[b]thiophen-4-one