3-(3'-oxo-butyl)-2-methyl-4-(1'',1''-dimethyl-propanal)-2-pentenone

4-oxo-5-hydroxy-2,2,5-trimethyl-9-methylene-trans-bicyclo<6,3,0>undecan-10-one

4-carboxymethyl-2,2,4,8-tetramethylbicyclo<5,3,0>deca-7-en-9-one