You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [(1S,2R,7S,9S,11R,12S,15R,16S)-8,8-difluoro-2,16-dimethyl-15-pentacyclo[9.7.0.02,7.07,9.012,16]octadec-5-enyl] acetate .
user
C22H30F2O2
assistant