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 2-(7-chloro-4-oxo-3-propylquinazolin-2-yl)sulfanyl-N-(1-thiophen-2-ylethyl)acetamide is given. What is its corresponding molecular formula?
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C19H20ClN3O2S2
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