The present invention relates to new polyunsaturated compounds of formula (I): in which R1 represents a group R'1 or -A-R'1, R'1 being chosen from - COOH, -COOR3, -CONH2, -CONHR3, - CONR3 R4, -CHO, -CH2OH, -CH2OR5, and A representing an alkylene, alkenylene, or alkynylene C2-C16, R2 represents: an optionally substituted aryl group or optionally substituted heteroaryl, an osidic residue or, a fatty acid residue optionally branched and / or preferably substituted at the chain end and in particular by a hydroxy, acetoxy radical or by a protected or unprotected amino radical, n group -OC - (CH2) n - CO -tocopheryl (alpha, beta or gamma or delta), with 2 <；= n 10 <；=, a group -R'2-O-R6, in which R'2 is an optionally substituted arylene group or optionally substituted heteroarylene, and R6 represents a hydrogen atom, a group linear or branched C1-C16 alkyl optionally substituted, C2-C16 alkenyl linear or branched optionally substituted, or linear or branched C2-C16 alkynyl, an optionally substituted tocopheryl radical or an analog, an amino acid residue, or an osidic residue. The invention also relates to the compositions, in particular cosmetic and / or dermatological compositions containing at least one compound of formula (I), as well as their use as a whitening and / or depigmenting agent, and the cosmetic process using these compositions.La présente invention concerne de nouveaux composés polyinsaturés de formule(I): dans laquelle R1 représente un groupement R'1 ou -A-R'1, R'1 étant choisiparmi - COOH, -COOR3, -CONH2, -CONHR3, -CONR3 R4, -CHO, -CH2OH, -CH2OR5, et Areprésentant un alkylène, alkénylène, ou alkynylène C2-C16, R2 représente : ungroupement aryle éventuellement substitué ou hétéroaryle éventuellementsubstitué, un résidu osidique ou, un résidu d'acide gras éventuellementramifié et/ou substitué de préférence en bout de chaîne et en particulier parun radical hydroxy, acétoxy ou par un radical amino protégé ou non, n groupe -OC -(CH2)
