You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-methyl-1-oxo-N-[2-oxo-2-(2,4,6-trimethylanilino)ethyl]-2,3-dihydropyrrolo[2,1-b][1,3]benzothiazole-3a-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H25N3O3S
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