You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 2-[[5-(3-chloro-4-methylphenyl)-4-ethyl-1,2,4-triazol-3-yl]sulfanyl]-1-phenylethanone is given. What is its corresponding molecular formula?
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C19H18ClN3OS
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