You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(5-ethylsulfanyl-1,3,4-thiadiazol-2-yl)-1-(pyrazine-2-carbonyl)azetidine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H14N6O2S2
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