You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-fluoro-10,14,18,19,22-pentazapentacyclo[13.5.2.12,6.110,13.018,21]tetracosa-1(21),2,4,6(24),15(22),16,19-heptaene The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H20FN5
assistant