| http://www.w3.org/ns/prov#value | - nched hydrocarbon chain including about 1 to about 20 carbons. where x is the chain length, i.e., 1 or greater, preferably about 1 to about 20, 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, and R1 is a straight or branched hydrocarbon chain including about 1 to about 20 carbons.
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