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system
Provide the molecular formula for the IUPAC named substance 2-[6-[(6-amino-5-methylpyrimidin-4-yl)amino]-8-methyl-1,5-dioxospiro[2H-imidazo[1,5-a]pyridine-3,4'-piperidine]-1'-yl]acetonitrile .
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C19H22N8O2
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