| http://www.w3.org/ns/prov#value | - are merely illustrative and are not to be understood as limiting the scope of the invention, which is limited only as indicated by the appended where X is a halogen atom and R is a monovalent hydrocarbon radical with a bifunctional amine having the formula where R is a divalent hydrocarbon radical and an acid acceptor selected from the group consisting of tertiary amines, alkali metal carbonates a
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