You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-(1-cyanocyclohexyl)-2-[4-(4-fluorophenyl)-4-methyl-2,5-dioxoimidazolidin-1-yl]acetamide into its molecular formula.
user
C19H21FN4O3
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