|   C4H1  |       1  |       2202  |       0.0036  |       0.0072  |       −1.6328  |       
  |    
|   C4H1  |       2203  |       3198  |       0.0077  |       0.0111  |       −1.0413  |       
  |    
|   C4H1  |       3199  |       4907  |       0.0089  |       0.0101  |       −0.4123  |       
  |    
|   C4H1  |       4908  |       5021  |       0.0000  |       0.0000  |       NA  |       
  |    
|   C4H2  |       1  |       560  |       0.0148  |       0.0150  |       −0.0266  |       
  |    
|   C4H2  |       561  |       1374  |       0.0036  |       0.0039  |       −0.1713  |       
  |    
|   C4H2  |       1375  |       2850  |       0.0000  |       0.0000  |       NA  |       
  |