| http://www.w3.org/ns/prov#value | - tic, or polymeric moiety; and n is an integer of at least two; with the proviso that either A or R2 or both (preferably, A) comprises an aromatic or heteroaromatic moiety that is directly ring-bonded to the adjacent ester groups shown in Formulas I-IV. The aromatic or heteroaromatic moiety can comprise one or more rings (which can be fused or can be separated by one or more spacer groups, for exam
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