FIELD: chemistry.
SUBSTANCE: invention relates to a compound of formula (I) wherein A is selected from substituted 3–12 membered cyclohydrocarbyl or heterocyclic hydrocarbyl or cyclic heterohydrocarbyl, wherein said heterocyclic hydrocarbyl or cyclic heterohydrocarbyl contains 1 or 2 heteroatoms in the ring, independently selected from N and S; B is selected from C(=O); X is a single bond; D and L are independently selected from CH2; T is C; M is selected from C(Y)(R1a), when Q is selected from C (R1b)(R1c), or M is selected from C(R1b)(R1c) when Q is selected from C(Y)(R1a); where A is selected from the structural unit shown in formula (A1) or (A2), the values of the remaining radicals are indicated in the claims. 
(I) 
(A1) (A2).
EFFECT: technical result: obtaining new compounds of formula (I), having the properties of orexin receptor antagonists.
8 cl, 1 tbl, 37 ex
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