You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (4R)-4-[1-[6-[2-(difluoromethyl)-1,3-thiazol-4-yl]-2-methylindazol-4-yl]oxyethyl]pyrrolidin-2-one into molecular formula.
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C18H18F2N4O2S
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