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Name the molecular formula for the molecule established as methyl 4-[(2-tert-butyl-4-oxo-3,5,7,8-tetrahydropyrido[4,3-d]pyrimidin-6-yl)methyl]-5-chloro-1-phenylpyrazole-3-carboxylate using the IUPAC nomenclature.
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C23H26ClN5O3
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