You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2-(2,5-dimethylpyrrol-1-yl)-N-[(1R)-3-methylsulfanyl-1-([1,2,4]triazolo[4,3-a]pyridin-3-yl)propyl]acetamide by IUPAC nomenclature, provide its molecular formula.
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C18H23N5OS
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