You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-bromo-3-[[2,3-dibromo-5-methoxy-4-[(4-methylphenyl)methoxy]phenyl]methylideneamino]-2-propylquinazolin-4-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H24Br3N3O3
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