(6R,7S,8R)-8-Isopropenyl-6-methyl-1,4-dioxa-spiro[4.4]nonane-7-carboxylic acid

2-Diazo-1-((6R,7S,8R)-8-isopropenyl-6-methyl-1,4-dioxa-spiro[4.4]non-7-yl)-ethanone

(6R,7S,8S)-8-((R)-2-Hydroxy-1-methyl-ethyl)-6-methyl-1,4-dioxa-spiro[4.4]nonane-7-carboxylic acid

(3'R,3'aS,7'R,7'aS)-5',6'-Dihydroxy-3',7'-dimethyl-hexahydro-spiro[[1,3]dioxolane-2,2'-inden]-4'-one