You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-1-[4-[(2,4-dichlorophenyl)methoxy]-3-ethoxyphenyl]-N-(1,2,4-triazol-4-yl)methanimine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H16Cl2N4O2
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