You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2S)-2-[4-(5-cyanopyridin-2-yl)piperazin-1-yl]-N-(1,3,4-thiadiazol-2-yl)propanamide into its molecular formula.
user
C15H17N7OS
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