You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 5-[[5-(2-bromo-4-methylphenyl)furan-2-yl]methylidene]-1-(furan-2-ylmethyl)-1,3-diazinane-2,4,6-trione ?
user
C21H15BrN2O5
assistant