You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 1-[1-[7-chloro-3-(4-methoxyphenyl)-4-oxoquinazolin-2-yl]ethyl]-3-(2,4-dichlorophenyl)-1-methylurea into its molecular formula.
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C25H21Cl3N4O3
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