With an aldehyde of the public formula (I) of any form of or mixtures thereof its stereoisomer, independently of each other, wherein each dotted line indicates single, double key N is 0 or 1 R1 is a hydrogen atom or monomethyl R2 is a hydrogen atom or monomethyl or ethyl R3 can be in any one in the position 2 to 6 for being present in cyclic annular segment, be a hydrogen atom or monomethyl or ethyl or a CH2 groups bridge location 3 and 6. In addition, assigning the odor notes of aldehyde, lily of the valley typewriting as perfume ingredient using aldehyde.
