You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[[5-(2-chlorophenyl)-4-methyl-1,2,4-triazol-3-yl]sulfanyl]-N-[(1R)-1,2,3,4-tetrahydronaphthalen-1-yl]acetamide into molecular formula.
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C21H21ClN4OS
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