You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4-(2,2-difluoro-1,3-benzodioxol-4-yl)-3,5,10,13,15-pentazatetracyclo[12.4.0.02,6.07,12]octadeca-1(14),2(6),3,7(12),8,10,15,17-octaene into molecular formula.
user
C20H11F2N5O2
assistant