| http://www.w3.org/ns/prov#value | - Suitable substituents comprise alkyl, alkaryl, aryl, aralkyl or alkenyl, such as alkyl groups of from 1-10 carbon atoms (methyl, ethyl, propyl, butyl, pentyl, decyl and the like), aryl are from 6-10 carbon atoms (such as phenol and naphthyl), alkaryl and aralkyl are from 7-10 carbon atoms (tolyl, xylyl, ethylphenyl, and the like) and alkenyl of 2-10 carbon atoms (such as ethenyl, propenyl, butenyl
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