You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (E)-1-[4-(5-bromo-1H-indol-3-yl)-3,6-dihydro-2H-pyridin-1-yl]-3-(3-fluorophenyl)prop-2-en-1-one .
user
C22H18BrFN2O
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