Described are polyalkylbicylic chemical derivatives for use a fragrance ingredients having the generic structure:
1
wherein m=0 or 1; wherein X is methyl or hydrogen;
wherein R
1
, R
2
, R
3
and R
4
each represents methyl or ethyl with the proviso that when X is methyl, each of R
1
, R
2
, R
3
and R
4
is methyl and when X is hydrogen, one of R
1
, R
2
, R
3
and R
4
is ethyl; and
wherein R
6
represents hydrogen or methyl. Methods for using and making these compounds are also disclosed.