You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[2-(2-fluorophenyl)-3-methyl-1H-indol-5-yl]methyl]-2,4-dioxo-1H-pyrimidine-6-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H17FN4O3
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