| http://www.w3.org/ns/prov#value | - C07c 119/04 U.S. Cl. 260-453 AL 1 Claim ABSTRACT OF THE DISCLOSURE Cyanic acid esters having the formula R(-OC N) in which R is an alkyl or cycloalkyl radical containing an electron-attracting substituent, an aryl radical, a substituted aryl radical free from the simultaneous presence of sterically hindered substituents in both ortho positions to the corresponding OCEN group or a heterocyclic radi
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