You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[4-(4-acetamidophenyl)-1,3-thiazol-2-yl]-2-(4-fluorophenyl)sulfanylacetamide by IUPAC nomenclature, provide its molecular formula.
user
C19H16FN3O2S2
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