You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(1S)-1-[4-(2-aminosulfanylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)phenyl]ethyl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H15N5OS2
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