You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 4,5-dichloro-N-(3-ethyl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyridin-6-yl)-1-methylpyrrole-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C14H17Cl2N5O
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