69  US  6,939,662  B2  70  -continued  -continued  (R3)  (R7)  (R9)  (RS)  (R4)  (RS)  (R6)  CF3  I  --fCH2-C-t- bo2Yl’r<CF3  ~  co 2 C(CH3)3  HO  ~a,  a,  co,---C])<co,cn,cn,on  CF3  I  --fCH2-C-t- bo2C(CH3)3  CF3  co 2 CH2CH20H  q~l]Jcn,  [  on  CF3  I  $^{--fCH2-}$1 -t- co2C(CH3)3  CF3  2 OH 