You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(2-chloro-5-ethylphenoxy)-5-isocyanobenzonitrile;ethyl 2-(4-chloro-3-hydroxyphenyl)acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H22Cl2N2O4
assistant