249  US 9,323,153 B2  250  -continued  (PA-64)  [Chem. 54-6]  [Chem. 54-7]  (PA-76)  (PA-86)  u  [Chem. 54-8]  (PA-91)  F  F  F  o  o*o  F+~-N~~  ~-N~- 11  II  F  F  II  \__J  F O  O  F  0  (PA-94)  F  F  F  o  o*o  F+~-N~~  ~-N~- 11  II  F  F  II  \__J  F O  O  F  0  I  (YN)  (PA-97)  0  0  II  F  N/rtF  F  N  I  (YN)  ~  (PA-98) 