You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-(2-chlorophenyl)-2-[[5-[(4-methylphenyl)sulfanylmethyl]-4-prop-2-enyl-1,2,4-triazol-3-yl]sulfanyl]acetamide into its molecular formula.
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C21H21ClN4OS2
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