Bicyclic aromatic derivatives, method for preparing them, and their use in human and veterinary medicine and in cosmetics

Bicyclic aromatic compound, having the formula ##STR23## in which n=0 or 1,

• R' represents hydrogen, OH, alkoxy having from 1 to 4 carbon atoms, or acyloxy having from 1 to 4 carbon atoms;
• R" represents hydrogen or alkoxy having from 1 to 4 carbon atoms;
• or R' and R" taken together form an oxo (.dbd.O), methano (.dbd.CH.sub.2) or hydroxyimino (.dbd.N--OH) radical;
• R represents --CH.sub.2 OH or --COR.sub.7 ;
• R.sub.7 represents hydrogen, --OR.sub.8 or ##STR24## in which R.sub.8 represents hydrogen, alkyl having from 1 to 20 carbon atoms, monohydroxyalkyl, polyhydroxyalkyl phenyl, phenyl substituted with at least one halogen atom, --OH, --NO.sub.2, lower alkyl having 1-6 carbon atoms, trifluoromethyl or a carboxylic acid function, benzyl, phenethyl, a residue of glucose, mannose, erythrose or galactose, or ##STR25## where p is 1, 2 or 3 and r' and r" represent hydrogen, lower alkyl having 1-6 carbon atoms, monohydroxyalkyl monohydroxyalkyl interrupted by a heteroatom, polyhydroxyalkyl, aryl or benzyl, amino acid residue, a residue of glucosamine, galactosamine, mannosamine or meglumine or when taken together with the nitrogen atom to which they are attached form a heterocycle;
• A represents methylene or dimethylene, unsubstituted or substituted with lower alkyl having 1-6 carbon atoms;
• R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent hydrogen or lower alkyl having 1-6 carbon atoms;
• R.sub.1 and R.sub.3 taken together are capable of forming a methylene or dimethylene radical, A representing a dimethylene radical;
• R.sub.5 and R.sub.6 represent hydrogen or methyl;
• and the salts of said compound, as well as their optical and geometric isomers.