Feb.28,2019  41  US 2019/0064665 Al  (4B)  (4C)  (4D)  [0161]  In formula (4A),  wa  is fluorine or a straight,  branched or cyclic C$_{1 }$-C$_{40 }$monovalent hydrocarbon group  (4A)  [0160]  In formula (4), x- is an anion selected from the  formulae ( 4A) to ( 4D).  -continued  ri  Y1  MeO~O  U s’Qo)  I# $_{0 }$ MeO~O  ~  6  c¢  en  06  CQCQ 