You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(2S,3S)-1-[(4-chloro-3-fluorophenyl)methyl]-2-(6-chloro-1H-indol-3-yl)-5-oxo-3-phenylsulfanylpyrrolidine-3-carbonyl]-N-ethylpiperazine-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H32Cl2FN5O3S
assistant