You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-[2-[2-[1-(2,2-difluoroethyl)pyrazol-4-yl]sulfonyl-4,6-dihydropyrrolo[3,4-c]pyrazol-5-yl]-2-oxoethyl]-3-methyl-1H-indol-2-one into its molecular formula.
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C21H20F2N6O4S
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