You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(Z)-3-(3-methyl-1,1-dioxo-3H-1,2-benzothiazol-2-yl)-1-phenyl-2-trimethylsilylprop-2-en-1-ol is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H25NO3SSi
assistant