| http://www.w3.org/ns/prov#value | - where x is the chain length, i.e., about 1 or greater, R is one of an alkyl group having from about 1 to about 20 carbons, preferably about 1 to about 12 carbons, a phenyl group, or a cyclic group, R.sub.1 is an alkyl group having about 1 to
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