You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[[4-cyano-3-[2-(4-fluoroanilino)-2-oxoethyl]sulfanyl-1,2-thiazol-5-yl]sulfanyl]-N-(4-fluorophenyl)acetamide into molecular formula.
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C20H14F2N4O2S3
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