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 5-[1-[4-(3-methylquinolin-8-yl)sulfonylpiperazin-1-yl]ethyl]-3-propan-2-yl-1,2,4-oxadiazole .
user
C21H27N5O3S
assistant