| http://www.w3.org/ns/prov#value | - 3 to about 12, wherein n is an integer typically of from 1 to about 20 and m is an integer typically of from about 3 to about 12, wherein n is an integer typically of from 0 to about 3, wherein R1 and R2 are alkyl groups, typically with from 1 to about 10 carbon atoms, although the number of carbon atoms can be outside of this range, and wherein R1 and R2 can be joined together to form a ring, an
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