You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-ethoxy-4-N-(4-methoxyphenyl)-2-N-(1-methylpiperidin-4-yl)-1,3,5-triazine-2,4-diamine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H26N6O2
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