You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-(5-methyl-1,2,4-oxadiazol-3-yl)piperidin-1-yl]-N,2-diphenylacetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H24N4O2
assistant