You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(8R,9S,10R,13S,14S)-2,6-dibromo-6-(bromomethyl)-16-fluoro-10,13-dimethyl-1,2,7,8,9,11,12,14,15,16-decahydrocyclopenta[a]phenanthrene-3,17-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H24Br3FO2
assistant