(1R,2R)-2-((R)-1-(tert-butyldiphenylsilyloxy)propan-2-yl)-1-(furan-2-yl)-cyclopentanol

(1R,5R,7S)-7-allyl-1-((R)-1-(tert-butyldiphenylsilyloxy)propan-2-yl)-6-oxaspiro[4.5]dec-8-en-10-one

(1R,5R,7R)-7-allyl-1-((R)-1-(tert-butyldiphenylsilyloxy)propan-2-yl)-6-oxaspiro[4.5]decan-10-one

((R)-2-((1R,5S,7R)-7-allyl-6-oxaspiro[4.5]decan-1-yl)propoxy)-(tert-butyl)diphenylsilane

(E)-ethyl 4-((1R,5S,7R)-1-((R)-1-(tert-butyldiphenylsilyloxy)propan-2-yl)-6-oxaspiro[4.5]decan-7-yl)-2-methylbut-2-enoate