ethyl 2-(2-ethoxy-tetrahydrofuran-3-yl)-2-oxoacetate

ethyl 2-(2-methoxytetrahydrofuran-3-yl)-2-oxoacetate

3a-bromohexahydrofuro[2,3-b]furan-3-ol

1-(4,5-dihydrofuran-3-yl)ethane-1,2-diol

tetrahydrofuro[2,3-b]furan-3(2H)-one