You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 6-(3-chlorophenyl)-2-[(3-nitrophenyl)methylsulfanyl]-6,7-dihydro-5H-[1,2,4]triazolo[5,1-b]quinazolin-8-one by IUPAC nomenclature, provide its molecular formula.
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C22H16ClN5O3S
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