You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named N-methyl-2-[[4-(4-methylphenyl)-5-oxo-[1,2,4]triazolo[4,3-a]quinazolin-1-yl]sulfanyl]acetamide is given. What is its corresponding molecular formula?
user
C19H17N5O2S
assistant