You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [(2R)-1-[2-[(2S)-butan-2-yl]anilino]-1-oxopropan-2-yl] 2-(2-fluorophenyl)sulfanylacetate into molecular formula.
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C21H24FNO3S
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