You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-(2,3-dihydro-1,4-benzodioxin-6-yl)-N-ethyl-N-methyl-1-propan-2-ylpyrazolo[3,4-b]pyridine-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H24N4O3
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