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 N-(2-methylphenyl)-4-[[2-(4-methylphenyl)-5-oxo-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-yl]methyl]piperazine-1-carboxamide ?
user
C25H26N6O2S
assistant