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What is the molecular formula of the compound with this IUPAC name tert-butyl 3-[2-[2-[[6-(4-methylpiperazin-1-yl)pyridin-3-yl]amino]-7-oxopyrido[2,3-d]pyrimidin-8-yl]ethyl]azetidine-1-carboxylate ?
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C27H36N8O3
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