FIELD: chemistry.
SUBSTANCE: invention relates to a novel compound of formula (I) or a pharmaceutically acceptable salt thereof, having epidermal growth factor receptor (EGFR) inhibitor properties. In formula (I)
,
group 
is (1) a group represented by formula A1 
(in formula A1, B denotes a group represented by formula 
[R1 means a hydrogen atom or C1-C6-alkyl group; and R2 means a group represented by formula 
, where R3, R4 and R5 are identical or different and each denotes a hydrogen atom, a halogen atom, C1-C6-alkyl group, phenyl, naphthyl or biphenyl, monocyclic or bicyclic C2-C9-heteroaryl group containing from 1 to 3 identical or different heteroatoms selected from nitrogen, oxygen and sulphur atoms, an aminomethyl group which can be substituted with C1-C6-alkyl group, or 1-piperidinomethyl group, or a group represented by formula 
, where R6 means a hydrogen atom or C1-C6-alkyl group], R7 and R8 are identical or different and each represents a hydrogen atom or C1-C6-alkyl group; m is 0 or 1; n is 1 or 2); (2) a group represented by formula A2: 
(in formula A2 B and n have values as defined in formula A1; and R9 means a hydrogen atom or C1-C6-alkyl group); or (3) a group represented by formula A3: 
(in formula A3 B, m and n have values as defined in formula A1; and R10 means C1-C6-alkyl group).
EFFECT: compounds can be used to produce an anticancer drug for treating or preventing cancer based on inhibitory effects on EGFR.
15 cl, 3 tbl, 31 ex
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