BICYCLIC AROMATIC COMPOUNDS AND PHARMACEUTICAL AND COSMETIC COMPOSITION CONTAINING THEREOF Russian patent published in 1999 - IPC

FIELD: organic chemistry, pharmacy, cosmetics. SUBSTANCE: invention describes new bicyclic aromatic compounds of the general formula (I) where R¹ - the group CO-O-R⁸ where R⁸ - hydrogen atom, alkyl, linear or branched radical with 1-20 carbon atoms or COR where R - lower alkyl; A - a radical taken among the group: (a) , (b) , (d) ; X means -O-, S(O)t or -NR⁹-; R² - hydrogen, halogen atom, lower alkyl, group OR⁹; t - the whole number 0, 1 or 2; R⁹ - hydrogen, halogen atom, lower alkyl, the group OR⁹; t - the whole number 0, 1 or 2; R⁹ - hydrogen atom or lower alkyl; R¹¹ and R¹² - hydrogen atom or lower alkyl or their salts. Compounds show the activity with respect to cellular differentiation and proliferation. Invention describes also pharmaceutical and cosmetic compositions based on compounds of the formula (I). EFFECT: valuable biological properties of compounds. 14 cl, 1 dwg, 27 ex