You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-N-[(1S)-1-cyclohexyl-2-oxo-2-[(2S)-2-(1,2,4,5-tetrahydro-3-benzazepin-3-ylmethyl)pyrrolidin-1-yl]ethyl]-2-(methylamino)propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H42N4O2
assistant