| prov:value
| - R1 to R3 or L may have various substituents, for example an alkyl group (preferably with 1 to 20 carbon atoms, more preferably 1 to 12 carbon atoms and particularly preferably 1 to 8 carbon atoms, such as methyl, ethyl, iso-propyl, tert-butyl, n-octyl, n-decyl, n-hexadecyl, cyclopropyl, cyclopentyl or cyclohexyl), an alkenyl group (preferably with 2 to 20 carbon atoms, more preferably 2 to 12 carb
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