You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 3-[2-(4-chloro-3,5-dimethylphenoxy)ethyl]-9-thia-1-azatricyclo[6.3.1.04,12]dodeca-2,4(12),5,7-tetraene-2-carboxylic acid into molecular formula.
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C21H20ClNO3S
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