The present invention relates to the use of a compound of formula (I) or a mixture of compounds of formula (I) wherein: R.sup.1, R.sup.2, and R.sup.3 are independently H or an alkyl group having 1 to 3 C-atom, wherein at least one of R.sup.1, R.sup.2, and R.sup.3 is not H; R.sup.4 is H, an alkyl group having 1 to 6 C-atom, or an alkenyl group having 2 to 6 C-atom; R.sup.5, R.sup.6, R.sup.7, and R.sup.8 are independently H or methyl; and R.sup.9 is H, an alkyl group having 5 to 12 C-atoms, or an alkenyl group having 5 to 12 C-atoms;as a flavoring substance or mixture of flavoring substances.