Cyclic ethers of formula ##STR1## wherein the dotted line indicates the location of a single or double bond and the symbol R represents an isopropenyl radical or a 1-ethoxy-1-methylethyl radical, are novel compounds with useful organoleptic properties. They can be used as active ingredients in perfuming compositions and perfumed products to which they confer rosy-fruity type odor notes. In addition, they possess flavor qualities which render these compounds useful for flavoring foodstuffs and drinks and, namely, mango-type drinks.A process for the preparation of the compounds of formula (I) is also disclosed.