You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[(6S)-3-cyano-6-methyl-4,5,6,7-tetrahydro-1-benzothiophen-2-yl]-2-[(5-methylsulfanyl-1,3,4-thiadiazol-2-yl)sulfanyl]acetamide into its molecular formula.
user
C15H16N4OS4
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