You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[2-[(2R,4R)-2-(4-fluorophenyl)-4-hydroxypyrrolidin-1-yl]ethyl]ethanesulfonamide by IUPAC nomenclature, provide its molecular formula.
user
C14H21FN2O3S
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