You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-benzylsulfanyl-N-[3-(3-pyridin-3-yl-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)phenyl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H20N6OS
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