You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-1-(3-benzoylsulfanyl-2-methylpropanoyl)-4-(4-chlorophenyl)sulfanylpyrrolidine-2-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H22ClNO4S2
assistant