You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[7-(2-methyl-3H-benzimidazol-5-yl)-3,5-dihydro-2H-1,4-benzoxazepin-4-yl]-naphthalen-2-ylmethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H23N3O2
assistant