You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-3-[4-[(11R,13S)-17-hydroxy-13-methyl-3-oxo-17-(1,1,2,2,2-pentafluoroethyl)-1,2,6,7,8,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-11-yl]phenyl]prop-2-enenitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C29H28F5NO2
assistant