You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-butyl-2,2-dichloro-N-[1-[3-(2-methoxyphenyl)-4-oxoquinazolin-2-yl]ethyl]acetamide by IUPAC nomenclature, provide its molecular formula.
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C23H25Cl2N3O3
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