You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named N-[1-[3-(4-chlorophenyl)-4-oxoquinazolin-2-yl]ethyl]-N-ethylcyclobutanecarboxamide is given. What is its corresponding molecular formula?
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C23H24ClN3O2
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