You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-[4-[(2,6-dichlorophenyl)methylideneamino]phenyl]sulfanyl-1-(1H-indol-6-yl)pyrrolidine-2,5-dione into its molecular formula.
user
C25H17Cl2N3O2S
assistant