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 6-[[4-[5-[[(2S)-1-(5-methyl-6-oxo-1H-pyridazin-4-yl)pyrrolidin-2-yl]methoxy]pyridin-3-yl]-3-oxobutyl]amino]pyridine-3-carbonitrile is given. What is its corresponding molecular formula?
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C25H27N7O3
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