2-methyl-6-oxoheptan-2-yl 2,2,2-trifluoroacetate

2-hydroxy-2,6-dimethyl-hept-5-enoic acid

2-methyl-5-(2-methyl-1,3-dioxolan-2-yl)pentan-2-yl 2,2,2-trifluoroacetate

2,6,6-trimethyl-tetrahydro-pyran-2,5-dicarboxylic acid anhydride

1,5,5-trimethyl-2,6-dioxabicyclo<2.2.2>octan-3-one