You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N'-[[3-[2-[3-(3-chloro-4-methoxyphenyl)propyl]pyrimidin-4-yl]phenyl]methyl]-N'-ethylpropane-1,3-diamine is the IUPAC name of a molecule. Please give its molecular formula.
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C26H33ClN4O
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