You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(6E)-5-imino-6-[[4-[(2-methyl-5-oxo-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-yl)methoxy]phenyl]methylidene]-2-propan-2-yl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H19N7O3S2
assistant