You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[3-[4-[2,6-bis(3-methylbutyl)phenyl]pyrazol-1-yl]phenoxy]-9-(4-methylpyridin-2-yl)carbazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C43H44N4O
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