Bicyclic naphthalenic derivatives, a process for preparing the same and human or veterinary medicines and cosmetic compositions containing said derivatives

A bicyclic naphthalenic compound having the formula ##STR17## wherein A represents methylene or dimethylene, substituted or not by lower alkyl having 1-6 carbon atoms,

• R.sub.1, R.sub.2, R.sub.3 and R.sub.4, each independently, represent hydrogen or lower alkyl having 1-6 carbon atoms, or
• R.sub.1 and R.sub.3 taken together form a methylene or dimethylene bridge when A represents dimethylene,
• R' represents hydrogen, OH, alkoxy having 1-4 carbon atoms, acyloxy having 1-4 carbon atoms or amino,
• R" represents hydrogen or alkoxy having 1-4 carbon atoms,
• or R' and R" taken together form an oxo, methano or hydroxyimino group,
• R represents --CH.sub.2 OH or --COR.sub.5,
• R.sub.5 represents hydrogen, OR.sub.6 or ##STR18## R.sub.6 represents hydrogen, alkyl having 1-20 carbon atoms, monohydroxyalkyl, polyhydroxyalkyl, phenyl or phenyl substituted by halogen, --OH, --NO.sub.2, lower alkyl having 1-6 carbon atoms, trifluoromethyl or a carboxylic acid function, benzyl or phenethyl, the residue of glucose, mannose, erythrose or galactose or ##STR19## p is 1, 2 or 3, and r' and r", each independently, represent hydrogen, lower alkyl having 1-6 carbon atoms, monohydroxyalkyl, monohydroxyalkyl interrupted by a heteroatom, polyhydroxyalkyl, aryl or benzyl, the residue of an amino acid, an aminoester, glucosamine, galactosamine, mannosamine or meglumine, or r' and r" together with the nitrogen atom to which they are attached, form a heterocycle substituted or unsubstituted,
• and the salts of said compounds of formula (I) or the optical isomers thereof.