1) Belgian invention 
<chemical> A butyrophenone with general properties similar to those of haloperidol. It has been used in the treatment of aberrant sexual behaviour. ... Pharmacological action: antipsychotic agents, butyrophenone, dopamine antagonists. ... Chemical name: 2H-Benzimidazol-2-one, 1-(1-(4-(4-fluorophenyl)-4-oxobutyl)-4-piperidinyl)-1,3-dihydro- .....