You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[3-(4-chlorophenyl)-5,6-dimethyl-4-oxothieno[2,3-d]pyrimidin-2-yl]sulfanyl-N-(2-fluorophenyl)acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H17ClFN3O2S2
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