You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R,16Z)-16-(aminomethylidene)-17-ethylimino-6-fluoro-3-methyl-2-oxa-10,13,20-triazatetracyclo[16.3.1.04,9.010,14]docosa-1(21),4(9),5,7,11,13,18(22),19-octaen-21-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H23FN6O
assistant