145488-32-0 1H,3H-Difuro(3,4-b:3',4'-e)pyridine-1,7(4H)-dione, 5,8-dihydro-8-(2-fluorophenyl)- 1H,3H-Difuro(3,4-b:3',4'-e)pyridine-1,7(4H)-dione, 8-(2-fluorophenyl)-5,8-dihydro- 5,8-Dihydro-8-(2-fluorophenyl)-1H,3H-difuro(3,4-b:3',4'-e)pyridine-1,7(4H)-dione