FIELD: chemistry.SUBSTANCE: invention relates to bi- and polycyclic substituted isoquinoline and isoquinolinones of formula (I), or to its stereoisomeric and/or tautomeric forms and/or to its pharmaceutically acceptable salts, where R1 represents OH; R3, R4, R5 and R8 represents H; R7 represents halogen or (C1-C6) alkyl; R6 represents one (C1-C4)alkylene, bound to a cycloalkyl ring, in which (C1-C4)alkylene forms the second bond with the other carbon atom of the cycloalkyl ring with the formation of a bicyclic ring system, where in the bicyclic ring system one carbon atom is substituted with a group, independently selected from O, S or SO2; and if m and s equal 2 or m equals 3 and s equals 1, R6 represents a group CH2-CH-(CH2)2, which via one group CH2 is bound to the cycloalkyl ring, and two other CH2 groups are bound to different carbon atoms of the cycloalkyl ring, and if m equals 3 and s equals 3, R6 represents two methylene groups, bound to different carbon atoms of the cycloalkyl ring, where the methylene groups or group CH2-CH-(CH2)2 are bound to the carbon atoms of the cycloalkyl ring and form an adamantane system of formula (XX) , where L can be bound to any secondary or tertiary carbon atom, or R6 together with R11 and an N atom form (C5) heterocycloalkyl, bound with the cycloalkyl residue in the form of a spirocyclic ring system, where the bicyclic ring system, or the adamantane system, or a ring system, containing (C5) heterocycloalkyl, represent non-substituted or optionally substituted with substituent R9; R9 represents (C1-C6)alkyl, (C2-C6)alkenyl, (C6)aryl or cyclopropyl R11 and R12 independently on each other represent H or (C1-C6)alkylene-(C6)aryl; n equals 0 or 1; m equals 2 or 3; s equals 1, 2 or 3; L represents O; its stereoisomeric and/or tautomeric forms and/or its pharmaceutically acceptable salts. The invention also relates to the application of a formula (I) compound.EFFECT: novel bi- and polycyclic isoquinoline and isoquinolinone derivati