You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N-(3,5-dimethoxyphenyl)-2-[6-(4-methylphenyl)sulfanyl-3-oxo-[1,2,4]triazolo[4,3-b]pyridazin-2-yl]acetamide ?
user
C22H21N5O4S
assistant