You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[[4-fluoro-3-[3-fluoro-4-(4-hydroxyphenyl)piperidin-1-yl]phenyl]methyl]pyrrolidin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H24F2N2O2
assistant