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H294680 (3'aS,4'R,5'R,6'aR)-Hexahydro-5'-hydroxy-5,5-dimethyl-spiro[1,3-dioxane-2,2'(1'H)-pentalene]-4'-carboxylic Acid Methyl Ester

D473565 (3'aS,4'R,5'R,6'aR)-5'-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]hexahydro-5,5-dimethylspiro[1,3-dioxane-2,2'(1'H)-pentalene]-4'-carboxylic Acid Methyl Ester

H294685 [3'aS-(3'aα,4'α,6'aα)]-Hexahydro-5,5-dimethyl-5'-oxo-spiro[1,3-dioxane-2,2'(1'H)-pentalene]-4'-carboxylic Acid Methyl Ester

B382885 cis-Bicyclo[3.3.0]octane-3,7-dione-3,7-bis(2',2'-dimethylpropylidene) Diketal