Patent ID: 7767650

Claim:
A compound having the following structural formula (I): in which: Ar is a radical of formulae (a) below: wherein R 7 is as defined below; R 1 is: (a) a hydrogen atom, (b) an alkyl radical having from 1 to 6 carbon atoms, (c) a radical of formula: (d) a radical —OR 8 , wherein R′, R″ and R 8 are as defined below; R 2 is a hydrogen atom or an alkyl radical having from 1 to 6 carbon atoms; R 3 is a hydrogen atom, an alkyl radical having from 1 to 6 carbon atoms or a radical —CO—R 9 , wherein R 9 is as defined below; R 4 and R 5 together form, with the adjacent aromatic ring from which they depend, a 5- or 6-membered ring optionally substituted with methyl groups; R 6 is an alkyl radical having from 1 to 6 carbon atoms or a radical —CO)R 10 , wherein R 10 is as defined below; R 7 is a hydrogen atom, a halogen atom, an alkyl radical having from 1 to 6 carbon atoms or a radical —OR 11 , wherein R 11 is as defined below; R 8 is a hydrogen atom, a linear or branched alkyl radical having from 1 to 20 carbon atoms, an alkenyl radical, a mono- or polyhydroxyalkyl radical, an optionally substituted aryl or aralkyl radical or a sugar residue or an amino acid or peptide residue; R 9 and R 10 are each CF 3 or an alkyl radical having from 1 to 6 carbon atoms; R 11 is H, an alkyl radical having from 1 to 6 carbon atoms or a radical —(CO)—R 12 , wherein R 12 is as defined below; R 12 is an alkyl radical having from 1 to 6 carbon atoms; R′ and R″ are each a hydrogen atom, an alkyl radical having from 1 to 6 carbon atoms, a mono- or polyhydroxyalkyl radical, an aryl radical or an amino acid, peptide or sugar residue; n is an integer ranging from 2 to 6; and the salts of the compounds of formula (I) when R 1 is a hydroxyl group, and also the optical and geometrical isomers of the compounds of formula (I).