You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[2-[(1R,2R)-2-hydroxy-2-methylcyclopentyl]oxy-5-(trifluoromethyl)pyridin-3-yl]benzenesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H19F3N2O4S
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