You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(10R,13S,16R)-16-fluoro-6-imino-10,13-dimethyl-1,2,4,5,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthrene-3,17-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H26FNO2
assistant