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 2-[1-[(5-propylsulfanyl-1,3,4-thiadiazol-2-yl)sulfanyl]ethyl]-3H-quinazolin-4-one .
user
C15H16N4OS3
assistant