You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 3-[5-chloro-2-(6-methyl-1,3-benzoxazol-2-yl)phenoxy]sulfonylthiophene-2-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H14ClNO6S2
assistant