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What is the molecular formula of the compound with this IUPAC name (3R,3aR,6aS)-3-(3-bromo-5-ethoxy-4-hydroxyphenyl)-2-(3-nitrophenyl)-5-(4-nitrophenyl)-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione ?
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C25H19BrN4O9
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