1-Butanone, 1-(4-fluorophenyl)-4-(hexahydropyrrolo(1,2-a)pyrazin-2(1H)-yl)-, dihydrochloride 2856-81-7 3162-75-2 Azabutyrone BUTYROPHENONE, 4'-FLUORO-4-(HEXAHYDROPYRROLO(1,2-a)PYRAZIN-2(1H)-YL)-, DIHYDROCH Butyrophenone, 4'-fluoro-4-(hexahydropyrrolo(1,2-a)pyrazin-2(1H)-yl)-, dihydrochloride