| http://www.w3.org/ns/prov#value | - In General Formula (1) or (2), for example, the organic group R1 or R2 is exemplified any of various groups including a straight or branched chain alkyl group of about 1 to about 4 carbon atoms, an aryl group such as phenyl, an aralkyl group such as benzyl, a hydrocarbon group such as cycloalkyl, an alkoxyl or aryloxy group derived from a hydrocarbon group such as the alkyl, aryl or aralkyl group,
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