You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as N-(2-methoxy-5-methylphenyl)-3-[3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl]propanamide using the IUPAC nomenclature.
user
C20H21N3O4
assistant