You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-(1,3-benzodioxol-5-ylmethyl)-5-[5-(1-methylpyrazol-4-yl)-1H-pyrrolo[2,3-b]pyridin-3-yl]-1,3,4-oxadiazolidin-2-imine by IUPAC nomenclature, provide its molecular formula.
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C21H19N7O3
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