Described are compounds defined according to the generic structure: ##STR1## wherein the dashed line represents a carbon-carbon single bond or a carbon-carbon double bond; and one of R.sub.1 and R.sub.2 is methyl and the other of R.sub.1 and R.sub.2 is hydrogen. In addition, organoleptic uses of such compounds are disclosed for augmenting or enhancing the aroma or taste of consumable materials including foodstuffs, chewing gums, chewing tobaccos, medicinal products, toothpastes, perfumes, perfumed articles (such as liquid or solid, anionic, cationic, nonionic or zwitterionic detergents), fabric softeners and dryer-added fabric softener articles.