You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[(5-methyl-1,2-oxazol-3-yl)methyl]-6-phenylthieno[2,3-d]pyrimidin-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H13N3O2S
assistant