You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-(2,3-dihydro-1H-inden-1-ylsulfamoyl)-N-(2,2,2-trifluoroethyl)benzamide by IUPAC nomenclature, provide its molecular formula.
user
C18H17F3N2O3S
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