102  US 7,541,131 B2  101  Rx  I  -----f  CH-,  F  Rx  I  -----fCH-2  F  0  Rx  I  -----fCH-,  F  0  0  0  Rx  I  -----fCH-,  F  0  HOOC  0  0  Rx  Rx  I  I  -----f  CH-,  F  -----f  CH-,  F  0  0  HO  Rx  I  -----f  CH-,  F  ~o  0  Rx  I  -----fCH-,  Fo  0  0  Rx  I  -----f  CH-,  F  0  (In the formulae, Rx represents  H, CH$_{3 }$ or CF$_{3}$ .)  -continued  -continued 