| abstract |
Compounds of general formula (I) in which U represents a group of general formula (A) or (B) in which formulae V represents a hydrogen or halogen atom, a(C1-C3) alkyl group or one or two (C1-C3) alkoxy groups, W and X each represent, respectively, either two oxygen atoms, or an oxygen atom and a CH2 group, or a CH2 group and an oxygen atom, or an oxygen atom and a CO group, n represents the number 0 or 1, R represents either a propyl group when U represents a group of general formula (A), or a hydrogen atom or a (C1-C3)alkyl group when U represents a group of general formula (B), Y represents one or more atoms or groups chosen from the following: hydrogen, halogen, (C1-C3) alkyl and (C1-C3) alkoxy, Z represents two hydrogen atoms or an oxygen atom. |