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 methyl 5-methyl-3-[(1,4,6-trimethylindazol-3-yl)carbamoylamino]thiophene-2-carboxylate is given. What is its corresponding molecular formula?
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C18H20N4O3S
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