FIELD: medicine, pharmaceutics.
SUBSTANCE: invention refers to new compounds of formula (IB) or to their pharmaceutically acceptable salts:
, wherein R means formula: 
R1 means -C(O)NR3R4, -C(O)R3 and -C(O)OR3; each R3 and R4 independently means H, C1-10 alkyl, wherein alkyl is optionally substituted by one -OH; R3 and R4 are bound together with N atoms to form a 5-6-member heterocyclic ring which additionally contains one O heteroatom; R5 means H; R6 means CN; R7 means H; W means C. What is described is a method for producing both them and intermediate compounds of formula (1-1c): 
, wherein: R1 means -C(O)NR3R4; R3 and R4 are specified above.
EFFECT: compounds (IB) shows DPP-IV inhibitory activity that allows them being used in a pharmaceutical composition.
9 cl, 12 ex
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