You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named ethyl 2-methyl-5-[[3-[3-(trifluoromethyl)phenyl]cyclobutyl]sulfamoyl]-1H-pyrrole-3-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C19H21F3N2O4S
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