(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

(ethyl carbonic) (6R,7S,8R)-6-methyl-8-(prop-1-en-2-yl)-1,4-dioxaspiro[4.4]nonane-7-carboxylic anhydride

(3'R,3'aS,7'S,7'aS)-3',7'-Dimethyl-3',3'a,7',7'a-tetrahydro-1'H-spiro[[1,3]dioxolane-2,2'-inden]-4'-one

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