You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(Z)-3-(1,3-benzodioxol-5-yl)-N-[5-(1-phenylethylsulfanyl)-1,3,4-thiadiazol-2-yl]prop-2-enamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H17N3O3S2
assistant