You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (E)-2-(benzenesulfonyl)-3-[4-methoxy-3-[(4-nitropyrazol-1-yl)methyl]phenyl]prop-2-enenitrile into its molecular formula.
user
C20H16N4O5S
assistant