You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-ethylsulfanyl-N-[5-[2-[(4-methylphenyl)sulfonylamino]ethyl]-1,3,4-thiadiazol-2-yl]benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H22N4O3S3
assistant