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 3,4-dimethyl-6-[3-oxo-3-(4-pyridin-2-ylpiperazin-1-yl)propyl]-2-phenylpyrazolo[3,4-d]pyridazin-7-one is given. What is its corresponding molecular formula?
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C25H27N7O2
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