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 2-[7-(4-fluorophenyl)-4-oxothieno[3,2-d]pyrimidin-3-yl]-N-(2-phenylethyl)acetamide .
user
C22H18FN3O2S
assistant