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 1-ethyl-2-[[5-fluoro-2-(methylsulfonylmethyl)phenyl]methyl]-3-([1,2,4]triazolo[4,3-a]pyridin-3-ylmethyl)guanidine into molecular formula.
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C19H23FN6O2S
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