You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[6-ethyl-3-(2-methylsulfanylethyl)-1,3-benzothiazol-2-ylidene]-3-(4-methylphenyl)sulfanylpropanamide into its molecular formula.
user
C22H26N2OS3
assistant