You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N,4-dimethyl-3-[4-(3-propan-2-yl-1,2,4-oxadiazol-5-yl)butanoylamino]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H24N4O3
assistant