FIELD: medicine, pharmaceutics.
SUBSTANCE: invention refers to the chemical-pharmaceutical industry and represents an agent for preventing or reducing pigmentation, containing a compound presented by the following formula (1) 
its stereoisomer and/or its pharmacologically acceptable salt, wherein: R1 represents a hydrogen atom or an alkyl group with a linear or branched chain having 1-4 carbon atoms; R2 represents a hydrogen atom or an unsubstituted aliphatic hydrocarbon group having 1-4 carbon atoms; R3 represents an unsubstituted aromatic group having 5-15 carbon atoms, substituted by an alkyl group having 1-6 carbon atoms, by an alkoxy group containing an alkyl chain having 1-6 carbon atoms, or by a phenyl group; R3 also represents an aromatic group having 5-15 carbon atoms; n is equal to 1 or 2, and m represents an integer falling within 0 to 3.
EFFECT: preparing the agent for preventing or reducing pigmentation.
10 cl, 10 ex, 6 tbl
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