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-(2-ethylimidazol-1-yl)propyl]-3-methyl-2,4-dioxo-1H-quinazoline-6-sulfonamide is given. What is its corresponding molecular formula?
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C17H21N5O4S
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