You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(6-bromo-2,3-dihydro-1,4-benzodioxin-7-yl)-2-[2-(difluoromethylsulfanyl)benzimidazol-1-yl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H14BrF2N3O3S
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