methyl (4S,4'S,4a'S,8a'S)-4'a,5',6',7',8',8'a-hexahydro-4'-hydroxy-5',5',8'a-trimethyl-2-oxospiro<1,3-dioxolane-4,1'(4'H)-naphthalene>-2'-carboxylate

6β,12-bis(tert-butyldimethylsilyloxy)-9α,11-carbonyldioxydrim-7-ene

12-acetoxy-9α,11-carbonyldioxydrim-7-ene

9α,11-carbonyldioxydrim-7-ene-6β,12-diol

(1S,4aS,8aS)-5,5,8a-trimethyl-2'-oxo-4a,5,6,7,8,8a-hexahydro-4H-spiro[naphthalene-1,4'-[1,3]dioxolane]-2-carbaldehyde