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What is the molecular formula of the compound with this IUPAC name 2,8-dimethyl-6-propan-2-ylpyrimido[5,4-d]pyrimidin-4-amine;2,4,7,8-tetramethyl-6-propan-2-ylpyrido[3,2-d]pyrimidine;4,5,6,8-tetramethyl-2-propan-2-ylpyrido[3,4-d]pyrimidine ?
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C39H53N11
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