You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(Z)-3-[3-[2-(4-ethoxyphenyl)-2-oxoethyl]sulfanylanilino]-3-oxo-1-pyridin-3-ylprop-1-en-2-yl]benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H27N3O4S
assistant