You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-[(4,6-dimethyl-2-oxo-1H-pyridin-3-yl)methylcarbamoyl]-2-ethoxyphenoxy]acetic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H22N2O6
assistant