Finally, we examine the specific mass spectrum of the T-1 compound (Figure ) show that the conventional model fails to predict the peak of ions derived from F 2 C --CF -CF 2 radical cation at m/z = 131, while our model predicts it at an accurate m/z with a reasonable intensity. In addition, the number of bit collision occurrences in the fingerprint (Figure , Identifier: 644590947), which is considered to be strongly related to the peak of F 2 C --CF -CF 2 -derived ions, was reduced by about 25% from 57.