You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-[(3,4-dichlorophenyl)methylsulfanyl]-4-ethyl-5-(5-propylthiophen-3-yl)-1,2,4-triazole into its molecular formula.
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C18H19Cl2N3S2
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