You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-methyl-N-[(1S)-1-[1-(quinoline-7-carbonyl)azetidin-3-yl]ethyl]-1,2-oxazole-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H20N4O3
assistant