| http://www.w3.org/ns/prov#value | - R7, R8, R9, R10, independently of one another, are hydrogen, a straight-chain or branched, saturated or unsaturated hydrocarbon radical having from 1 to 40, preferably from 1 to 20, carbon atoms, which may be unsubstituted or may carry at least one functional group, or where 2 of the radicals are bonded to one another, in particular to give a heterocyclic radical having from 5 to 10 carbon atoms,
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