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Translate the chemical IUPAC name 1-[(7R)-5-(4-chlorophenyl)-7-(4-methoxyphenyl)-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]pyrrolidine-2,5-dione into its molecular formula.
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C22H18ClN5O3
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