You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[4-[(Z)-1-amino-3-iminoprop-1-en-2-yl]-3-methoxyphenyl]-3-[(3-fluorophenyl)methyl]imidazolidin-2-one into its molecular formula.
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C20H21FN4O2
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