You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(2-cyano-3-methylbutan-2-yl)-2-[[4-(2-methylphenyl)-5-oxo-[1,2,4]triazolo[4,3-a]quinazolin-1-yl]sulfanyl]propanamide by IUPAC nomenclature, provide its molecular formula.
user
C25H26N6O2S
assistant