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system
Provide the molecular formula for the IUPAC named substance [(2R,3S,5R)-5-[5-[(E)-2-bromoethenyl]-2,4-dioxopyrimidin-1-yl]-3-(4-chlorobenzoyl)oxyoxolan-2-yl]methyl 4-chlorobenzoate .
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C25H19BrCl2N2O7
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