You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[8-[1-[3-(cyanomethyl)-1-cyclopropylsulfonylazetidin-3-yl]pyrazol-4-yl]-[1,2,4]triazolo[1,5-a]pyridin-2-yl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H20N8O3S
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