Methyl 7,7-dimethyl-1,4-dioxo-2-methoxycarbonyl-4,5,6,7-tetrahydroindane-2-yl-acetate

methyl 2-(bromomethyl)-6,6-dimethyl-3-oxocyclohex-1-ene-1-carboxylate

Methyl-1.4-dioxo-7.7-dimethyl-4.5.6.7-tetrahydroindan-2-carboxylat

ethyl 7,7-dimethyl-4,4-ethylenedioxy-2-methoxycarbonyl-1-oxo-perhydroinden-2-ylacetate

2,3-epoxy-2,6,6-trimethyl-cyclohexanecarboxylic acid ethyl ester