You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule N-[(1R)-1-[5-ethynyl-3-(4-fluorophenyl)-4-oxoquinazolin-2-yl]ethyl]-2-methylpyrazolo[1,5-a]pyrimidine-3-carboxamide into molecular formula.
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C26H19FN6O2
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