You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(3,5-dimethylpiperidin-1-yl)-2-(1-methyl-2-propan-2-yl-6,7-dihydro-4H-imidazo[4,5-c]pyridin-5-yl)ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H32N4O
assistant