Cosmetic composition useful notably for the skin whitening and melanogenesis inhibiting agent containing such a cosmetic composition

A cosmetic composition useful notably in the whitening of skin, comprising in association with any cosmetically acceptable excipient, at least one compound of the following general formula (I):

• wherein:
• R1 represents a hydrogen atom, a linear or branched alkyl group or a thiazoline group,
• R2 represents a hydrogen atom, a linear or branched alkyl group or a linear or branched alkyl group substituted by a carboxyl, a hydroxyl, an amine or a thiol group,
• R3 represents a hydrogen atom, a linear or branched alkyl group, an aralkyl group, an acyl group or an acyloxy group,
• R4 represents a hydrogen atom or a linear or branched alkyl group,
• R5 represents a hydrogen atom, a hydroxyl group or a linear or branched alkyl group;
• wherein the composition additionally contains an organosilicon compound of the following general formula (II):
• wherein at least one of the radicals R6, R7, R8, or R9 represents a hydroxyl group or an alkoxy, acyloxy, aryloxy, or amine group, or a halogen atom and at least another of said radicals R6, R7, R8, or R9 represents an alkyl group.