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system
Name the molecular formula for the molecule established as 5-chloro-4-[[3-[2-[4-[(4-fluorophenyl)methyl]piperazin-1-yl]-2-oxoethoxy]-4-methoxyphenyl]methylamino]-1H-pyridazin-6-one using the IUPAC nomenclature.
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C25H27ClFN5O4
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