You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(3-chloro-4-fluorophenoxy)-1-[(3S,4S)-3-(4-fluorophenoxy)-4-hydroxy-4-(2-methylpropyl)piperidin-1-yl]ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H26ClF2NO4
assistant