You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 2-(3a-methyl-1,5-dioxo-2,3-dihydropyrrolo[1,2-a]quinazolin-4-yl)-N-(4,6-dimethyl-1,3-benzothiazol-2-yl)acetamide into molecular formula.
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C23H22N4O3S
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