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system
Name the molecular formula for the molecule established as 6-[[6-(5-chloro-2-methoxyphenyl)pyridin-3-yl]methyl]-2-pyrimidin-5-yl-7,8-dihydro-5H-pyrido[4,3-d]pyrimidine using the IUPAC nomenclature.
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C24H21ClN6O
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