abstract |
A compound of formula (A) **(See formula)** in which R1 is selected from C1-C8-alkyl and C2-C8-alkenyl, and esters of the compound of formula (A), and ketones of the compound of formula (A), with the proviso that R1 may also be hydrogen, if compound (A) is an ester of formula (A); and with the proviso that the compound 1-(1,2,2,6-tetramethylcyclohexyl)ethanone is excluded. |