You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-chloro-2-[[4-[[2-hydroxyethyl(methyl)amino]methyl]benzoyl]amino]-N-[(4-methoxyphenyl)methylideneamino]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H27ClN4O4
assistant