You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(3-chlorophenyl)methyl]-2-(5-chloro-1H-pyrrolo[2,3-b]pyridin-3-yl)-5-fluoropyrimidin-4-amine;molecular hydrogen The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H16Cl2FN5
assistant