You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (3S,3aS,6aR)-3-(4-bromophenyl)-5-(4-ethoxyphenyl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione into its molecular formula.
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C25H21BrN2O4
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