You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-[1-(1,3-benzodioxol-5-yl)ethyl]-3-(3-cyano-5,7-dimethylpyrazolo[1,5-a]pyrimidin-6-yl)propanamide is the IUPAC name of a molecule. Please give its molecular formula.
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C21H21N5O3
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