You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-[3-[4-(3-methylimidazo[1,5-a]pyridin-1-yl)triazol-1-yl]propyl]-[1,2,4]triazolo[4,3-a]pyridine by IUPAC nomenclature, provide its molecular formula.
user
C19H18N8
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