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aromatic ring group, epresents an 1 to 4 • Ar1 r . teger of from ’ ted by gen- nts an m •t represen . n represe . the repeating um h oup consistmg d further wherem . lected from t e gr an 1 (III-1) 1s se . era! fornm a . repeating umts: of the followmg 

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. the repeatmg d . g to claim 25, whelre1(Vn I) is selected . cor m I fi mm a •t . 26. The resm ac d by the genera o . repeating um s. •t (C) represente . . of the followmg um p cons1stmg from the grou 

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