You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [5-(5-bromofuran-2-yl)-1,3,4-oxadiazol-2-yl]methyl 4-methyl-1,5-dioxo-2,3-dihydropyrrolo[1,2-a]quinazoline-3a-carboxylate .
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C20H15BrN4O6
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