You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[3-fluoro-4-(1-propyl-3,3a,4,6,7,7a-hexahydro-2H-pyrrolo[3,2-c]pyridin-5-yl)phenyl]-1,2-dihydro-1,2,4-triazole-3,5-diamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H28FN7
assistant