You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by N-(1,1-dioxothiolan-3-yl)-2-(5-methyl-7-oxo-1H-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl)acetamide ?
user
C12H15N5O4S
assistant