You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as N-(2-bromo-4-methylphenyl)-2-[(5-oxo-4-propyl-[1,2,4]triazolo[4,3-a]quinazolin-1-yl)sulfanyl]acetamide using the IUPAC nomenclature.
user
C21H20BrN5O2S
assistant