FIELD: medicine, pharmaceutics.
SUBSTANCE: claimed invention relates to compounds of formula (I) 
where R1 represents 
or 
and values of R2, R3 and R4 radicals are given in the invention formula, as well as to pharmaceutical compositions based on said compounds.
EFFECT: compounds of formula (I) and based on them compositions can be applied for treatment of cancer diseases: both solid tumours and hematologic cancers, such as leukemia, lymphoma and multiple myelomas.
11 cl, 10 ex, 2 tbl
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