5,5-二甲基-2,4(3h,5h)-呋喃二酮

9-acetyl-3,3-dimethyl-10-phenyl-3,4,9,10-tetrahydro-1H-furo<3,4-b><1,5>benzodiazepin-1-one

3,3-dimethyl-10-(4'-nitrophenyl)-3,4,9,10-tetrahydro-1H-furo<3,4-b><1,5>benzodiazepin-1-one

3-methoxycarbonyl-5,5-dimethyl-4-(3-methylbut-3-enyloxy)-2-oxo-2,5-dihydrofuran

3-methoxycarbonyl-5,5-dimethyl-4-(2-(cyclohex-1-en-1-yl)ethoxy)-2-oxo-2,5-dihydrofuran