methanesulfonic acid 7-(tert-butyl-diphenyl-silanyloxy)-5-hydroxy-2,2-dimethyl-hexahydro-benzo[1,3]dioxol-5-ylmethyl ester

(1R,2S,4R,5R,6R)-4,5-dihydroxydihydro-5'H-7-oxaspiro[bicyclo[4.1.0]heptane-2,2'-furan]-5'-one

3-(tert-butyl-diphenyl-silanyloxy)-8,9-dihydroxy-1-oxa-spiro[4.5]dec-6-en-2-one

Δ6,7-8,9-O-isopropylidene-1-oxa-spiro[4.5]decan-2-one

8,9-dihydroxy-1-oxa-spiro[4.5]dec-6-en-2-one

(2R,3a'R,5a'R,6a'R,6b'R)-4-((tert-butyldiphenylsilyl)oxy)-2',2'-dimethylhexahydro-4'H,5H-spiro[furan-2,5'-oxireno[2',3':3,4]benzo[1,2-d][1,3]dioxol]-5-one

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

1-(tert-butyl-diphenyl-silanyloxy)-3-(2-hydroxy-5,5-dimethyl-hexahydro-1,4,6-trioxa-cyclopropa[e]inden-2-yl)-propan-2-one oxime

3-hydroxy-Δ6,7-8,9-O-isopropylidene-1-oxa-spiro[4.5]decan-2-one

(3aR,5R,7aS)-4'-((tert-butyldiphenylsilyl)oxy)-2,2-dimethyl-3a,3',4',7a-tetrahydro-4H,5'H-spiro[benzo[d][1,3]dioxole-5,2'-furan]-5'-one

1-(tert-butyl-diphenyl-silanyloxy)-3-(2-hydroxy-5,5-dimethyl-hexahydro-1,4,6-trioxacyclopropa[e]inden-2-yl)-propan-2-one

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

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