| http://www.w3.org/ns/prov#value | - Substituted R2 groups are exemplified by, but not limited to, halogen such as chlorine or fluorine, ether, poly(oxyalkylene) groups described by formula CH3O(CH2)mO)p(CH2)q??? where m, p and q are positive integers and preferably a positive integer of 1 to 9, alkoxy, acyloxy, acyl, alkoxycarbonyl and trialkylsiloxy groups.
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