You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name ethyl 4-(4-fluorophenyl)-5-(2-methoxy-2-oxoethyl)-5H-imidazo[1,5-a]quinazoline-3-carboxylate into its molecular formula.
user
C22H20FN3O4
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