You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-ethoxy-N-[2-[(2R)-3-hydroxy-3-methylbutan-2-yl]-3-oxo-1H-isoindol-4-yl]benzamide into molecular formula.
user
C22H26N2O4
assistant