Multi-substituted tetrahydrofurans and tetrahydropyrans

An odorant composition, which includes a compound selected from the group consisting of tetrahydrofurans of structures 1 or 2, or tetrahydropyrans of structure 3:

• ##STR121## wherein R is acyclic, where acyclic refers to a chain of at least four carbon atoms substituted with at least three methyl groups in the chain, mono carbocyclic, where carbocyclic refers to a ring of 5-8 carbon atoms, and with at least two methyl groups on the ring, or bi-carbocyclic where bi-carbocyclic refers to two carbon rings, each ring having between 5-8 carbon atoms fused together, substituted with at least two methyl groups, and where R.sub.1 =CH.sub.3, or higher alkyl group having 2 to 6 carbon atoms, R.sub.2 =H, CH.sub.3, or higher alkyl group having 2 to 6 carbon atoms, R.sub.3 =H, or CH.sub.3, and R.sub.4 and R.sub.5 =H, CH.sub.3, or higher alkyl group having 2 to 6 carbon atoms.