The present invention relates to the cosmetic use of at least one compound of general formula (I): in which: R1 represents a methyl or ethyl radical; R2 represents a hydrogen atom or a methyl or ethyl radical; R3 represents a linear C1-C6 or branched C3-C6 alkyl radical, or a linear C2-C6 or branched C3-C6 alkenyl radical; and X represents ═O or —OH, as an agent for reducing and/or delaying the signs of skin ageing.