You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[11-[2-(dimethylamino)acetyl]-5,6-dihydrobenzo[b][1]benzazepin-2-yl]-2-phenylacetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H27N3O2
assistant