The compounds 1-[3-(methylthio)butyryl]-2,6,6-trimethyl-cyclohexene and/or the corresponding 1,3-cyclohexadiene analog having the generic structure: ##STR1## wherein the dashed line could be a single or a double carbon-carbon bond and processes and compositions containing same are described for the use in perfume augmenting and enhancing compositions and for use perfume aroma imparting compositions; produced by a process illustrated by the reaction: ##STR2## The above-mentioned compounds produce: In perfumes, fruity, floral, natural rose oil-like and earthy aromas with potato top notes and minty, tomato vine, Brussel sprout-like and woody undertones.