You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(1-carbamoylcyclohexyl)-3-(1-methyl-2-oxo-3H-imidazo[4,5-b]pyridin-6-yl)benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H23N5O3
assistant