| http://www.w3.org/ns/prov#value | - R1 (N═R2)x wherein x is an integer of 1 to about 10; R1 is independently selected from the group consisting of ##STR2## cycloalkyl having about 4 to about 7 carbon atoms; phenyl, benzyl; ##STR3## and alkyl having 1 to about 20 carbon atoms or alkenyl having 1 to about 20 carbon atoms; wherein R3 is hydrogen, alkyl having 1 to about 20 carbon atoms, alkenyl having 1 to about 20 carbon atoms o
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