You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[(2R)-1-[ethyl(methyl)amino]propan-2-yl]-5,6,7,8-tetrahydro-1H-imidazo[4,5-c]azepin-4-one into its molecular formula.
user
C13H22N4O
assistant