You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 8-(4-chlorophenyl)-2-ethyl-7-pyridin-4-yl-5-[[6-(trifluoromethyl)pyridin-3-yl]methyl]-[1,2,4]triazolo[4,3-b]pyridazine-3,6-dione is given. What is its corresponding molecular formula?
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C25H18ClF3N6O2
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