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 N-[[(2R)-1-ethylpyrrolidin-2-yl]methyl]-1-(5-oxo-7-propyl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-2-yl)piperidine-4-carboxamide is given. What is its corresponding molecular formula?
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C21H32N6O2S
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