1093-22-7 4-(2-Azaspiro(4.5)dec-2-yl)-4'-fluoro-butyrophenone 5-20-04-00402 (Beilstein Handbook Reference) BRN 1430820 BUTYROPHENONE, 4-(2-AZASPIRO(4.5)DEC-2-YL)-4'-FLUORO-