You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [2-oxo-3-(oxolan-2-ylmethylcarbamoyl)chromen-7-yl] 6-bromo-2-oxochromene-3-carboxylate into its molecular formula.
user
C25H18BrNO8
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