| http://www.w3.org/ns/prov#value | - Examples of such esters include: C1 -C6, more preferably C1 -C4, alkyl esters, for example the methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, t-butyl, pentyl and hexyl esters; aralkyl (including diarylalkyl) esters, such as the benzyl, p-nitrobenzyl and benzhydryl esters; lower aliphatic acyloxyalkyl groups, such as the acetoxymethyl or pivaloyloxymethyl groups; alkoxycarbonylalkyl
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