You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2S,3S)-3-(2,5-difluorophenyl)-3-(7-fluoro-3,3-dimethyl-2H-indol-1-yl)propane-1,2-diol .
user
C19H20F3NO2
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