You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (E)-N-[2-(5-hydroxy-1H-indol-3-yl)ethyl]-3-[4-hydroxy-3-(trideuteriomethoxy)phenyl]prop-2-enamide .
user
C20H20N2O4
assistant