7-methanesulfonyloxy-8,9-O-isopropylidene-1-oxaspiro[4.5]decan-2-one

5-(tert-butyldiphenylsilanyloxy)-6,7-O-isopropylidene-1-oxaspiro[2.5]octane

7-(tert-butyldiphenylsilanyloxy)-8,9-O-isopropylidene-1-oxa-spiro[4.5]decan-2-one

3-[7-(tert-butyldiphenylsilanyloxy)-5-hydroxy-2,2-dimethyl-hexahydrobenzo[1,3]dioxol-5-yl]propionitrile