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What is the molecular formula of the compound with this IUPAC name 3-[5-(3-chloro-4-methylphenyl)-1,2,4-oxadiazol-3-yl]-7-piperidin-4-yl-2,3,3a,4-tetrahydro-1H-pyrazolo[1,5-a]pyrimidin-5-one ?
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C20H23ClN6O2
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