TRICYCLIC DICARBONYL DERIVATIVES AND DRUG BASED ON SAID Russian patent published in 2000 - IPC

FIELD: organic chemistry, heterocyclic compounds, pharmacy. SUBSTANCE: invention relates to tricyclic dicarbonyl derivatives of the formulas (Ia) , (Ib) , (II) where R¹ and R² each independently means hydrogen atom, (lower) alkyl, (lower) alkoxy-, nitro-, trifluoromethyl-, amino-group, halogen atom and R² can mean additionally morpholino-group, 5- or 6-membered heterocycle containing 1-3 nitrogen atoms and optionally substituted with (lower) alkyl, hydroxy-group or the group -NR⁵R⁶ where R⁵ and R⁶ can be identical or different and mean hydrogen atom, (lower) alkyl and X in the formula (II) means -CH=CH-, CH=N-, -NH-, -CO- or -O-, and pharmaceutically acceptable salts of compounds of the general formulas (Ia), (Ib) and (II) also with exception of 2,3,5,6-tetrahydro[1,2,4] -triazole[1,5-c] quinazoline-2,5-dione and drug based on thereof also. Synthesized compounds are used in medicine as nervous system protective substances. EFFECT: valuable properties of substances. 11 cl, 3 tbl, 59 ex