You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(3S)-1-[2-(2-chloronaphthalen-1-yl)ethyl]-2-oxo-4,5-dihydro-3H-1-benzazepin-3-yl]-2-(methylamino)propanamide;hydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H29Cl2N3O2
assistant