The present invention relates to the field of perfumery and provides certain bi-cyclo derivatives of formula (I)wherein R1 represents a hydrogen atom or a C1-2 alkyl group； R2 represents a hydrogen atom or a methyl group； and A represents a group of formula C3-5 alkanediyl group； at least one of said R1 or R2 represents a group containing at least one carbon atom. The compounds are in the form of a E or Z isomer or of a mixture thereof. These compounds are valuable perfuming ingredients capable of imparting lily of the valley and citrus notes to consumer products.
