| http://www.w3.org/ns/prov#value | - R3 is hydrogen, halogen or an organic radical having from 1 to 40 carbon atoms, preferably halogen, for example fluorine, chlorine, bromine or iodine, or an organic radical having from 1 to 40 carbon atoms, for example C1-C40-alkyl, C1-C10-fluoroalkyl, C2-C40-alkenyl, C6-C40-aryl, C6-C10-fluoroaryl, arylalkyl, arylalkenyl or alkylaryl each having from 1 to 10, preferably from 1 to 4, carbon atoms
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