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 methyl 4-methyl-3-[methyl-[(4-oxo-3H-quinazolin-2-yl)methyl]sulfamoyl]benzoate is given. What is its corresponding molecular formula?
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C19H19N3O5S
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