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'-(3-ethyl-4-oxoquinazolin-2-yl)-2,4-diphenyl-1,3-thiazole-5-carbohydrazide is given. What is its corresponding molecular formula?
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C26H21N5O2S
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