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 6-acetyl-3-(4-chlorophenyl)-1-[(2-fluorophenyl)methyl]-5-methylthieno[2,3-d]pyrimidine-2,4-dione into molecular formula.
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C22H16ClFN2O3S
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