Abstract: Described are bicyclic lactones, both fused ring lactones defined according to the generic structure: and spiro lactones defined according to the generic structure: uses thereof in augmenting, enhancing or imparting aromas in or to perfume compositions, perfumed articles, colognes and perfumed polymers; processes for preparing such bicyclic lactones and intermediates therefor.

Abstract: Processes and compositions are described for the use in foodstuff flavor and aroma and perfumes and perfumed articles aroma augmenting, modifying, altering and enhancing compositions and as foodstuff, chewing gum, toothpaste, medicinal product, perfumes and perfumed articles aroma imparting materials of tricyclic isochroman mixtures wherein in the mixtures each of the compounds is defined according to the structure: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 represent methyl or hydrogen with the proviso that when one of R.sub.1, R.sub.2 and R.sub.3 is methyl, the other of R.sub.1, R.sub.2 and R.sub.3 represents hydrogen.Addition of said tricyclic isochroman mixtures is indicated to produce:a. In food flavorings a sweet, musky aroma and taste; andb. In perfumes and perfumed articles and colognes a sweet, musk aroma.