You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 1-[2-(3-aminopropyl)-5-(2,5-difluorophenyl)-2-(3-fluorophenyl)-1,3,4-thiadiazol-3-yl]-2-methylpropan-1-one ?
user
C21H22F3N3OS
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