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system
Provide the molecular formula for the IUPAC named substance 4-N-(5-tert-butyl-1H-pyrazol-3-yl)-5-chloro-2-N-[[3-(2-fluorophenyl)-1,2-oxazol-5-yl]methyl]pyrimidine-2,4-diamine .
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C21H21ClFN7O
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