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-[(3S,3aS)-3-(4-chlorophenyl)-7-methoxy-3,3a,4,5-tetrahydrobenzo[g]indazol-2-yl]-5-methyl-1,3-thiazol-4-one is given. What is its corresponding molecular formula?
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C22H20ClN3O2S
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