You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(4-bromophenyl)-3-[(E)-[1-(4-ethylphenyl)-2,5-dimethylpyrrol-3-yl]methylideneamino]urea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H23BrN4O
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