You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[[4-[[2-[6-(4-methoxy-3-propoxyphenyl)-4,5-dihydro-3H-pyridazin-2-yl]-2-oxoethoxy]iminomethyl]phenyl]hydrazinylidene]propanedinitrile by IUPAC nomenclature, provide its molecular formula.
user
C26H27N7O4
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