Abstract: The compounds of formula wherein R1 represents a methyl or ethyl group, R2 represents an ethyl group, a linear or branched propyl group, or an isobutyl group and the wavy bond indicates that the carbon number 2 is asymmetric and can adopt a configuration R or S, are useful as perfuming ingredients for the preparation of perfumes, perfuming compositions and perfumed articles. They can be used to impart a very natural fruity note.

Abstract: The compounds according to the general formula in which formula the dotted lines indicate a single or a double bond, n and m are 0 or 1, R1 is hydrogen or an acyl group —C(O)R3, R3 being a linear or branched alkyl or alkylene group from C1 to C8, the oxygen atom being bound to the adjacent &agr;-carbon atom by a double bond in the case where n is 0 and by a single bond in the case where n is 1, R2 is hydrogen or a linear or branched alkyl, alkenyl or alkoxy group from C1 to C8, or R2 is an alkenoxy group which is linked to the group R1 to form a 1,3-dioxolane cycle having 5 to 7 ring members, are useful perfuming ingredients. The most preferred compounds according to the invention are those which have a damascone- or damascenone-like structure, with the methyl substituent being in 4-position of the ring instead of the 2-position, as is the case in damascones and damascenones.

Abstract: The compounds of formula wherein the acetyl substituting group is either in position 2 or in position 3 of the cycle, or any mixture of compounds of formula (I) are novel compounds which can namely confer a natural odor of the leather type to products or compositions to which they are added.