Feb.4,2021  9  US 2021/0033971 Al  q-<J<:~.  ~:~:~:  _)-{ _)-{ _)-{  u  Q  ’  ~o Q-<o ~o  o- o- o- 1  I  I  ~0- ~0- !\__JO  ~  ~  0  ~- ]  ~-{  •~:  ~-{ ~: --t-(  0  ;t-<:  >-t-<: -rt<:  ~: ’i-< :J--<  0  H2  0  0  [0061]  Examples of the anion in the monomer from which  recurring units (a) are derived are shown below but not  limited thereto.  ’  -continued 