You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(4-methylphenyl)methylsulfanyl]-N-[3-methylsulfanyl-1-([1,2,4]triazolo[4,3-a]pyridin-3-yl)propyl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H24N4OS2
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