(+)-isopropyl 3-(tert-butyldiphenylsilyloxymethyl)-6α-(ethenyloxymethoxy)-1α-hydroxy-5β-(methoxymethoxy)-3-cyclohexene-1-carboxylate

(+)-isopropyl 2α-bromomethyl-7-(tert-butyldiphenylsilyloxymethyl)-5β-hydroxy-4aβ,5,8,8a-tetrahydro-4H-1,3-benzodioxin-8aβ-carboxylate

(1aS,2R,3aS,5R,7aR,7bR)-5-Bromomethyl-hexahydro-1,4,6-trioxa-cyclopropa[a]naphthalene-2,3a-dicarboxylic acid 2-tert-butyl ester 3a-ethyl ester