7-methoxymethoxy-2,2-dimethyl-4-(4-nitrophenylcarbonyloxy)-5-tert-butyldimethylsilyloxy-(3aS,4S,5S,7S,7aS)-perhydrobenzo[d][1,3]dioxol

4-hydroxy-4-hydroxymethyl-7-methoxymethoxy-2,2-dimethyl-5-tert-butyldimethylsilyloxy-(3aS,4S,5S,7S,7aS)-perhydrobenzo[d][1,3]dioxol-4-ol

ethyl 2-[6-chloromethyl-2,2-dimethyl-(3aS,4S,6S,6aS)-perhydrofuro[3,4-d][1,3]dioxol-4-yl]acetate

7-methoxymethoxy-2,2-dimethyl-4-methylene-5-tert-butyldimethylsilyloxy-(3aR,5S,7S,7aS)-perhydrobenzo[d][1,3]dioxole

2-[6-chloromethyl-2,2-dimethyl-(3aS,4S,6S,6aS)-perhydrofuro[3,4-d][1,3]dioxol-4-yl]-1-ethanol