You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methoxy-N-[2-[3-[2-(2-methoxyanilino)-2-oxoethyl]sulfanylindol-1-yl]ethyl]benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H27N3O4S
assistant