FIELD: chemistry.
SUBSTANCE: invention relates to novel diarylamine-containing compounds of formula (I) or formula (4b), pharmaceutically acceptable salts thereof, which have c-kit inhibiting properties. In formulae 
(I) and 
(4b), each R1 independently denotes H, -C(O)OH and -L1-C1-6alkyl, where L1 denotes -O- or -C(O)O-, or any two neighbouring R1 groups can together form a 5-6-member heterocyclic ring containing a nitrogen atom or an oxygen atom as a heteroatom, a 6-member heterocyclic ring with one or two nitrogen atom s as heteroatoms, optionally substituted with a C1-4alkyl, and R5 denotes hydrogen or C1-C6alkyl; values of radicals Ar and Q are given in the claim. The invention also relates to a pharmaceutical composition containing said compounds, and a method of treating diseases whose development is promoted by c-kit receptor activity.
EFFECT: more effective use of the compounds.
17 cl, 3 tbl, 9 ex
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