FIELD: pharmaceutics.SUBSTANCE: invention relates to compounds of formula I or pharmaceutically acceptable salts thereof, which have antihypertensive action. In formula I X represents O or NR7； group is bonded to any carbon ring atom, different from carbon atom to which are bonded R1 and R2； R1 represents hydrogen or together with R2 forms =O； R2 represents hydrogen or together with R1 forms =O； R4 is -C1-6alkyl； R5 and R6, which are bonded to any available carbon ring atom, independently represent hydrogen or R5 and R6 in cases when they are bonded to same carbon atom, form =O； R7 is -C1-6alkyl, -C(O)O-C-1-6alkyl, -C(O)O-C-1-6alkylene-CR8R9R10, -C(O)C1-6alkyl, -C(O)OC3-6carbocycle, -C(O)aryl, -C(O)heteroaryl, where heteroaryl is unsaturated 5- or 6-member ring containing 1-4 heteroatoms selected from N, -C(O)NHC1-6alkyl, -C(O)NH-adamantyl, -SO2C1-6alkyl, aryl or unsaturated 5- or 6-Member heteroaryl ring containing 1-4 heteroatoms selected from N, where aryl, alkyl, alkylene, carbocycle and heteroaryl are unsubstituted or substituted with 1-4 groups independently selected from -CN, halogen, -CF3, -OCF3, -C(O)NH2, -C-1-6alkyl, aryl, unsaturated 5-member heteroaryl ring with 1-3 nitrogen atoms, where R8 and R9 together with carbon atom to which they are bonded form C3-6carbocycle or 4-8-member heterocycle containing an oxygen atom, and where R10 is C1-6alkyl.EFFECT: invention also relates to pharmaceutical compositions containing said compounds, and a method of treating hypertension.29 cl, 43 exИзобретение относится к соединениям формулы I или их фармацевтически приемлемым солям, которые обладают антигипертензивным действием. В формуле I X представляет собой О или NR7； группа присоединена к любому атому углерода кольца, отличному от атома углерода, к которому присоединены R1 и R2； R1 представляет собой водород или вместе с R2 образует =O； R2 представляет собой водород или вместе с R1 образует =O； R4 представляет собой -С1-6алкил； R5 и R6, которые присоединены к люб
