You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[(1R,2S)-1-[4-[6-[(cyanomethylsulfonylamino)methyl]pyridin-3-yl]phenyl]-3-fluoro-1-hydroxypropan-2-yl]-2,2-difluoroacetamide by IUPAC nomenclature, provide its molecular formula.
user
C19H19F3N4O4S
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