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system
Provide the molecular formula for the IUPAC named substance 3-[4-[3-[5-(1,1-difluorobut-2-enyl)-1,2,4-oxadiazol-3-yl]benzoyl]piperazin-1-yl]pyrazine-2-carbonitrile .
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C22H19F2N7O2
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