| http://www.w3.org/ns/prov#value | - ut 20 atoms; k is 1 or 2; m is an integer of 0 to 6; and R3 and R4 independently represent a monovalent alkyl group of 1 to 12 carbon atoms, a cyanoalkyl group of 1 to 4 carbon atoms, an aryl, alkaryl, or arylene group having 6 to 10 ring atoms and less than about 15 total carbon atoms, an alkylene, alkyleneoxy, alkylene-tert-amino, or alkylenethio group 1 to 3 carbon atoms, an alkyleneacylamino g
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