You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-(furan-2-yl)-2-oxoethyl]sulfanyl-4-(3-methoxyphenyl)-[1,2,4]triazolo[4,3-a]quinazolin-5-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H16N4O4S
assistant