You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[2-[2-(4-fluorophenyl)morpholin-4-yl]-2-oxoethyl]-6-phenylthieno[2,3-d]pyrimidin-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H20FN3O3S
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