FIELD: chemistry.
SUBSTANCE: invention relates to pyrazinone derivatives of formula (I):
, where R1, R2, R3, R4, R5, R and R7 are as defined in claim 1 of the invention. The invention also describes a crystalline form, compounds of formula I, use of the compound of formula I in producing a medicinal agent for treating chronic obstructive pulmonary disease. A pharmaceutical composition and a pharmaceutical product are also described. Methods of obtaining compounds of formula I are also described.
EFFECT: novel compounds which can be used in therapy are obtained and described.
20 cl, 334 ex, 15 tbl, 12 dwg
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