You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N'-[2-(cyclohexylamino)-2-oxoethyl]-N'-(4-ethoxyphenyl)-N-(4-methylpyridin-2-yl)butanediamide into molecular formula.
user
C26H34N4O4
assistant