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-[1-[(2,2-difluorocyclopropyl)methyl]-3-methyl-2,1,3-benzothiadiazol-5-yl]-4-methoxybenzonitrile into molecular formula.
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C19H17F2N3OS
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