. 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  *  *  *  *  *  OH.  ......... CH2-CH  -r*  ’  ,:?"’  I  F  OH  *--f-CH2-CH-y-*  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  US 9,217,919 B2 