232  US 9,829,796 B2  231  -continued  -continued  (HR-23)  (HR-24)  j:  ~  F3C  CF3  (HR-25)  CH3  CH3  I  I  -----t-CH2-Cr  -----t-CH2-Cr  OAO  OAO  I  +  CF  F2T/ ’1F2  F2C......_ /CF2  C  F2  (HR-26)  j: j:  ~  F3C  CF3  (HR-27)  •:–:  (HR-28)  HR-29  •:t~  O  OYCF3  O  O  CF3  HR-30  •:t~  O  OYCF3  O  O  CF3  0  HR-31 