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 1-(1H-indol-3-yl)-2-[[5-[(3-methylphenoxy)methyl]-1,3,4-oxadiazol-2-yl]sulfanyl]ethanone .
user
C20H17N3O3S
assistant