| http://www.w3.org/ns/prov#value | - The aryl ring formed by Z201 is an aryl ring preferably having from 6 to 30 carbon atoms, more preferably from 6 to 20 carbon atoms, particularly from 6 to 12 carbon atoms, e.g., phenyl group, naphthyl group, anthryl group, phenanthryl group, pyrenyl group.
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