You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 6-[(4-propylphenyl)methyl]-2-(trifluoromethyl)-3,5,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-one into its molecular formula.
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C18H20F3N3O
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