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 (1E,6E,8E)-9-(3-ethenyl-1-methylpyrrol-2-yl)-1-[4-(4-methyl-1,4-diazepan-1-yl)phenyl]nona-1,6,8-triene-3,5-dione .
user
C28H33N3O2
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