You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-[(5-propan-2-yl-1,3,4-thiadiazol-2-yl)carbamoyl]phenyl] 2,5-dimethylbenzenesulfonate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H21N3O4S2
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