| http://www.w3.org/ns/prov#value | - Examples of the substituted or unsubstituted styryl group include unsubstituted styryl group and 2,2-diphenylvinyl group as well as substituted styryl group and substituted 2,2-diphenylvinyl group whose terminal phenyl group has one or more substituents such as a halogen atom, a hydroxy group, a substituted or unsubstituted diarylamino group expressed by ???NAr1Ar2 where Ar1 and Ar2 each independe
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