You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[2,4-dimethyl-5-(2-oxoazetidin-1-yl)phenyl]-1,1,1-trifluoromethanesulfonamide by IUPAC nomenclature, provide its molecular formula.
user
C12H13F3N2O3S
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