prov:value
| - R2 represents an alkyl group (containing preferably 1 to 20, more preferably 1 to 12, particularly preferably 1 to 8, carbon atoms, with examples including methyl, ethyl, iso-propyl, tert-butyl, n-octyl, n-decyl, n-hexadecyl, cyclopropyl, cyclopentyl and cyclohexyl groups), an aryl group (containing preferably 6 to 30, more preferably 6 to 20, particularly preferably 6 to 12, carbon atoms, with ex
|