145594-58-7 1H,3H-Difuro(3,4-b:3',4'-e)pyridine-1,7(4H)-dione, 5,8-dihydro-8-(3-bromophenyl)- 1H,3H-Difuro(3,4-b:3',4'-e)pyridine-1,7(4H)-dione, 8-(3-bromophenyl)-5,8-dihydro- 5,8-Dihydro-8-(3-bromophenyl)-1H,3H-difuro(3,4-b:3',4'-e)pyridine-1,7(4H)-dione 6,8-Dioxo-7-(3'-bromophenyl)-2,3,4,6,7,8-hexahydro(difuro)(3,4-b;3',4'-e)pyridine