The present invention concerns compounds of formula (I) in the form of any one of its stereoisomers or a mixture thereof, and wherein one dotted line represents a carbon-carbon single or double bond and the others a carbon-carbon single bond; each R, independently from each other, represents a hydrogen atom or a methyl or ethyl group provided that at least one of said R groups represents a methyl or ethyl group; and R1 represents a methyl or ethyl group; and their use in perfumery to impart odor notes of the woody type having cedar, ambery, patchouli and/or rooty aspect.