5-Chlor-2,3-bis-p-toluolsulfonyl-5-desoxy-1,4-anhydro-xylit

4(R)-[3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl]-2(R)-(hydroxymethyl)-3(S)-(tert-butyldiphenylsilyloxy)tetrahydrofuran

1,4-anhydro-5-O-benzoyl-2-deoxy-2-<3,4-dihydro-4-oxo-1(2H)-pyrimidinyl>-D-lyxitol

(4aR,7R,8aS)-8-Hydroxymethyl-8-nitro-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-7-ol

4(R)-[{(3-ethoxy-1-oxo-2-propenyl)aminocarbonyl}amino]-2(R)-(tert-butyldimethylsilyloxymethyl)-3(S)-(tert-butyldiphenylsilyloxy)tetrahydrofuran