FIELD: organic chemistry, medicine.
SUBSTANCE: invention relates to compounds of formula I 
, wherein G is carbon or nitrogen atom; A is i) phenyl substituted with any from -COOH, -CONH2, COOCH3, -CN, -NH2 or -COCH3; ii) naphthyl, benzophuranyl, and quinolinyl; and iii) formulae 
, 
, 
.
Compounds of present invention are useful in particular in pain treatment.
EFFECT: new agents for pain treatment.
58 ex
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