| http://www.w3.org/ns/prov#value | - Aryl groups exemplifying the hydrocarbon group represented by R7, R8, R9 or R10 include aryl groups having 6 to 20 carbon atoms, such as phenyl, indenyl, naphthyl (1-naphthyl, 2-naphthyl), anthryl, phenanthryl, acenaphthylenyl and fluorenyl (9-fluorenyl, 1-fluorenyl).
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