| http://www.w3.org/ns/prov#value | - When R1 is a phenyl radical substituted by OR4, NR5R6 and/or by SR7 and the substituents OR4, NR5R6 and SR7 form 5- or 6-membered rings, via the radicals R4, R5, R6 or R7, with other substituents on the phenyl ring or with one of the carbon atoms of the phenyl ring, for example the following structural units are obtained In the present application, the term ???heteroaryl??? denotes unsubstituted a
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