FIELD: chemistry.
SUBSTANCE: invention relates to heterocyclic compound of formula 
(I) or to pharmaceutically acceptable salt thereof, wherein Y is CH, N or CR4; W is carbonyl, sulfonyl or CR5R6; 
is 
or 
is independently selected from the group containing 
R and R' independently selected from -CR1R2R3, where R1 is selected from C1-4alkyl; R2 is C1-4alkyloxycarbonylamino; R3 is hydrogen; R4 is hydrogen or fluorine; CR5R6 together form oxetane. The invention also relates to pharmaceutical composition based on compound of formula (I), its use and product on its base.
EFFECT: obtaining novel heterocyclic compounds, useful in the treatment of HCV infections.
14 cl, 2 tbl
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