Synonyms: 1-Butanone,1-(4-fluorophenyl)-4-(hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl)-,dihydrochloride (9CI); Butyrophenone,4'-fluoro-4-(hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl)-, dihydrochloride (7CI);Butyrophenone, 4'-fluoro-4-(hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl)-,dihydrochloride (8CI); Pyrrolo[1,2-a]pyrazine, 1-butanone deriv.; Azabutyrone