You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-bromo-4-methoxy-N-[2-[2-(4-methoxyphenyl)-1,3-oxazol-4-yl]ethyl]benzenesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H19BrN2O5S
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