FIELD: medicine, pharmaceutics.
SUBSTANCE: compound under the invention is represented by formula (I) 
or its pharmaceutically acceptable salt where R1 and R2 represent H or optionally substituted alkyl where substitutes are specified from -N(CH3)2, -OH, -OCH3; B represents N; Z represents N; each of W, X and Y independently represents C-H, C-J; Ar represents an optionally substituted phenyl ring where substitutes are specified from halogen, -NH-CH3; each J independently represents NR1R2; and n is equal to 0; provided the compound is not 4-[2-(5-chloro-2-fluorophenyl)pteridine-4-ylamino]nicotinamide. The compounds of formula (I) can find application in treating HCV related conditions.
EFFECT: preparation of the new compounds for making a drug for treating HCV infection.
15 cl, 2 tbl, 9 ex
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