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 ethyl 2-[2-[[(E)-2-cyano-3-(4-propoxyphenyl)prop-2-enoyl]amino]-1,3-thiazol-4-yl]acetate .
user
C20H21N3O4S
assistant