The invention relates to a cosmetic composition, particularly for hair care, and to a method for cosmetically treating keratin material, particularly the hair, using the compounds of Formula (I), where: —n=1, 2, 3, or 4; —R1, R′1, R2, and R′2 are H, —OH, —NRR′, or a C1-C18 carbon group capable of containing one or more heteroatoms selected from among O, S, and N; and —Z is a multivalent carbon radical optionally substitutable and/or interruptible by specific groupings, it being understood that said radical Z includes at least one heteroatom selected from among N, O, and S.