You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-(2-amino-3,3,5-trimethyl-5a,6,6a,10a,11,11a-hexahydrobenzo[h][1]benzazepin-4-yl)ethanone into its molecular formula.
user
C19H26N2O
assistant