You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[2-(4-cyanoanilino)-6-(ethylamino)pyrimidin-4-yl]oxy-5,7-dimethoxynaphthalene-2-carbonitrile;hydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H23ClN6O3
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