N,N-Diethyl-<(tert-butyldimethylsilyl)oxy>-6-formyl-1,3-benzodioxole-5-carboxamide

N,N-Diethyl-4-<(tert-butyldimethylsilyl)oxy>-6-(1-hydroxy-3-butenyl)-1,3-benzodioxole-5-carboxamide

N,N-Diethyl-4-<(tert-butyldimethylsilyl)oxy>-6-<5-(phenylsulfonyl)-6-nitro-2-cyclohexen-1-yl>-1,3-benzodioxole-5-carboxamide