You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[2-[(5-methyl-1,2-oxazol-3-yl)amino]-2-oxoethyl]sulfanyl-4-oxothieno[3,2-d]pyrimidin-3-yl]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H15N5O4S2
assistant