You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(Z)-3-(3-chloro-5-ethoxy-4-prop-2-ynoxyphenyl)-2-(3,4-dimethoxyphenyl)prop-2-enenitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H20ClNO4
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