You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule methyl 3-cyclohexyl-1-[(4-methyl-1,2,5-oxadiazol-3-yl)methyl]-2-oxoimidazo[4,5-b]pyridine-6-carboxylate ?
user
C18H21N5O4
assistant