You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-[[2-(2-chlorophenyl)-5-(3-methoxyphenoxy)-3-oxopyridazin-4-yl]amino]-N-(2-pyridin-2-ylethyl)benzamide into its molecular formula.
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C31H26ClN5O4
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