prov:value
| - s of the formulae --O--, --S--, --SO2 --, --CO--, 1,4-piperidino, --NH-- and --N(Ro)--, where Ro has the abovementioned meaning, and/or for aliphatic and aryl radicals to be linked to one another by such a hetero group, and in which R* in each case denotes a hydrogen atom, an alkyl group with 1 to 4 carbon atoms, such as the methyl or ethyl group, an alkoxy group with 1 to 4 carbon atoms, such as
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