| http://www.w3.org/ns/prov#value | - R5, R6 and R7 independently of one another particularly preferably each represent hydrogen or ethyl, propyl, butyl, pentyl, hexyl, heptyl or octyl, each of which is optionally mono- to tetrasubstituted by identical or different substituents from the group consisting of fluorine, cyclopropyl, difluorocyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl, each of which is straight-chain or branched an
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