You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-chloro-2-fluorophenyl)-2-[(5-thiophen-2-yl-1H-1,2,4-triazol-3-yl)sulfanyl]propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H12ClFN4OS2
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