| http://www.w3.org/ns/prov#value | - wherein u is an integer of from 1 to about 20, wherein w is an integer of from 1 to about 20, wherein R1 and R2 each, independently of the other, are hydrogen atoms, alkyl groups, or aryl groups, and p is an integer of 0 or 1, wherein p is an integer of 0 or 1,
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