You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1'-acetyl-1-[2-(5-chloro-1,3-thiazol-2-yl)acetyl]-N-(cyclohexylmethyl)spiro[2H-indole-3,3'-pyrrolidine]-5-sulfonamide into its molecular formula.
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C25H31ClN4O4S2
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