You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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5-[1-(3,5-dichlorophenyl)sulfonyl-3,4-dihydro-2H-quinolin-3-yl]-1,4-dihydropyrazolo[3,4-d]pyrimidine-4,6-diamine is the IUPAC name of a molecule. Please give its molecular formula.
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C20H19Cl2N7O2S
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