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 N-[4-(1,3-benzothiazol-2-yl)phenyl]-3-(3-propyl-1,2,4-oxadiazol-5-yl)propanamide .
user
C21H20N4O2S
assistant