You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N,N-dimethyl-2-[[(2-methylsulfanylpropylamino)-(1,2,3,4-tetrahydronaphthalen-2-ylamino)methylidene]amino]acetamide;hydroiodide into its molecular formula.
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C19H31IN4OS
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