You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [1-(2-fluorophenyl)sulfonylpyrrolidin-2-yl]-[4-(piperidine-1-carbonyl)piperazin-1-yl]methanone into its molecular formula.
user
C21H29FN4O4S
assistant