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 5-(4-ethoxyphenyl)-3-[2-(4-methoxyphenyl)-2-oxoethyl]-6-methylthieno[2,3-d]pyrimidin-4-one .
user
C24H22N2O4S
assistant