You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-(4-methylphenyl)-5-oxo-N-[[3-(2-oxopiperidin-4-yl)-1,2,4-oxadiazol-5-yl]methyl]pyrrolidine-3-carboxamide into molecular formula.
user
C20H23N5O4
assistant