You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-(4-amino-7-methylpyrrolo[2,3-d]pyrimidin-5-yl)-3-fluorophenyl]-3-[(1-ethylpyrrol-2-yl)methyl]imidazolidin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H24FN7O
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