You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-[[(2S)-2-(1,3-benzothiazol-2-yl)pyrrolidin-1-ium-1-yl]methyl]-5-propylsulfanyl-1,3,4-thiadiazole-2-thione into its molecular formula.
user
C17H21N4S4+
assistant