You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 3-[3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl]-N-(3-phenylprop-2-ynyl)propanamide .
user
C21H19N3O3
assistant