prov:value
| - A compound of the formula (I) according to claim 1, wherein R1 is hydrogen or methyl, R2 is --(CH2)2-6 --, n is 1, 2 or 3 and if n is 1, A is a group of the formula (IIa)-(IIb) or (IId)-(IIe) in which X and Y which can be identical or different are C1 -C4 alkoxy or a group ##STR49## where R14 and R15 which can be identical or different are C1 -C12 alkyl, cyclohexyl, 2,2,6,6-tetramethyl-4-piperidyl
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