You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name N-[5-(7-methyl-7,8-diazabicyclo[4.2.0]octa-1(6),2,4-trien-3-yl)-7-oxo-3-pyridin-2-yl-1H-pyrazolo[1,5-a]pyrimidin-2-yl]propanamide into its molecular formula.
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C21H19N7O2
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