You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-ethoxy-N-(7-methyl-5-oxo-[1,3]thiazolo[3,2-a]pyrimidin-6-yl)benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H15N3O3S
assistant