You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (E)-N-[1-[3-(4-ethylphenyl)-4-oxoquinazolin-2-yl]propyl]-N-(2-methoxyethyl)-3-phenylprop-2-enamide by IUPAC nomenclature, provide its molecular formula.
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C31H33N3O3
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