| http://www.w3.org/ns/prov#value | - ible for these aryloxy, arylmercapto and arylamino radicals, for example, to carry the substituents indicated above for aryl (as a substituent of the aliphatic acyl R1), by an optionally substituted hetero-aromatic 5-membered or 6-membered ring with 1 to 4 hetero-atoms, in particular nitrogen, sulfur or oxygen, such as is described in detail under --SR5, by hydroxyl, by alkoxy with 1-4 C atoms, in
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