| http://www.w3.org/ns/prov#value | - 20 carbon atoms, particularly preferably 6 to 12 carbon atoms, such as phenyl, p-methylphenyl, naphthyl or anthranyl), an acyl group (preferably having 1 to 30 carbon atoms, still preferably 1 to 20 carbon atoms, particularly preferably 1 to 12 carbon
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