You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule N-[4-[2-[3-(4-chlorophenyl)-5,6-dimethyl-4-oxothieno[2,3-d]pyrimidin-2-yl]sulfanylacetyl]phenyl]acetamide ?
user
C24H20ClN3O3S2
assistant