You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 2-cyclopropyl-4-methyl-6-[2-(4-methyl-2-oxo-3,4-dihydro-1H-1,5-benzodiazepin-5-yl)-2-oxoethyl]sulfanylpyrimidine-5-carbonitrile is given. What is its corresponding molecular formula?
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C21H21N5O2S
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