You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2,5-dimethoxyphenyl)methyl]-2-[(2S)-2-ethyl-6-methyl-3-oxo-1,4-benzoxazin-4-yl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H26N2O5
assistant