You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(4,6-dimethyl-2-phenylmethoxypyridin-3-yl)methyl]-7-ethoxy-6-methyl-2,3-dihydro-1,4-benzoxazepin-5-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H30N2O4
assistant