3-[O5-(tert-butyl-dimethyl-silanyl)-O2,O3-isopropylidene-β-D-ribofuranosyl]-pyrrole-2,5-dione

methyl 2-(2',3'-di-O-methoxymethyl-β-D,L-arabinofuranosyl) glycolate

2-[(3aR,4R,6S,6aS)-6-(tert-Butyl-diphenyl-silanyloxymethyl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-3-cyano-propionic acid methyl ester

[(3aR,4R,6S,6aS)-6-(tert-Butyl-dimethyl-silanyloxymethyl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-hydroxy-acetic acid methyl ester

(3aS,4S,6S,6aS)-6-(2-Cyano-1-methoxycarbonyl-ethyl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxole-4-carboxylic acid