| http://www.w3.org/ns/prov#value | - ly being an unsubstituted alkyl group having 1 to 8 carbon atoms, such as a methyl group, ethyl group, propyl group, isopropyl group, butyl group, etc., or such an alkyl group hydroxy-substituted such as a 2-hydroxyalkyl, 3-hydroxyalkyl group, etc., any aryl group being preferably a phenyl group, halogen-substituted phenyl group (e.g., chloro-substituted phenyl group), alkyl-substituted phenyl gro
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