| http://www.w3.org/ns/prov#value | - r group, preferably unsubstituted monovalent alkyl or aryl groups, or are the following nitrogen-containing structure: ##STR4## with the proviso that at least one of R1, R3, and R8 are according to Structure IV, wherein R9 is a divalent alkyl group such as --(CH2)s -- where s is from 1 to 10, preferably 3 to 6 and most preferably 3;
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