You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[3-[3,4-diethyl-2,5-bis[(Z)-prop-1-enyl]phenyl]-5-[3-(6-methylpyridin-3-yl)phenyl]phenyl]-4,6-diphenylpyrimidine is the IUPAC name of a molecule. Please give its molecular formula.
user
C50H45N3
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