A method of use, as a perfuming ingredient, of a compound of formula I in the form of any one of its stereoisomers or a mixture thereof, and wherein each R1 represents a hydrogen atom or a methyl group and at least one of said R1 is a hydrogen atom; R2 represents a linear or branched C3-8 alkyl group or unsaturated groups; and R3 represents a hydrogen atom or a methyl group. These compounds impart odor notes of the violet leaves type optionally together with green odor notes.